you are completely correct, and maybe even over-doing it (i mean, 10 copys might be a bit over the top? Altough it's completely up to you... whatever makes you feel safe...).
I think the more important question is: where do you save your 10 copys.... If you put them all in your floorsafe, and you get robbed or your house burns down, you still lose everything.
It might be a good idear to keep a copy with the notary, or in a bank safe, or with your parents/siblings/...

BTW: you do know not to use the paper wallet you posted earlyer, yes? It is compromised, so it's a throw-away now!

I actually think the owner of a campaign might benefit from 0 minimum posts:
If somebody makes 0 posts/week, the owner of the campaign owes them nothing, but the member might still have a couple hundred posts he made earlyer. Each of these posts carries an advertisement for the campaign owner. So somebody with 200 historical posts, making only 2-3 posts/month at the moment might actually be a really good deal for the campaign owner: very little costs but a big ammount of advertisement space.

Like a couple others said: it looks like you're a bit confused about the technology.

What i would propose is the following:
Go to https://bitcoinpaperwallet.com/bitcoinpaperwallet/generate-wallet.html?design=alt-testnet
Create a TESTNET paper wallet
Go to a TESTNET faucet (can easily be found in google), claim some FREE TESTNET coins
Install a TESTNET wallet on your android phone and on your desktop (you can use bitcoin core and run it on testnet to)
Experiment with these TESTNET coins untill you understand what you're doing
Send the TESTNET coins back to the faucet once you know what you're doing, no need to keep them, they don't have any value anyways

^^ this is in fact the first reason why i picked bitmixer...

For me, i think it's important i only post when i want to post... So i really don't like sig campaigns that have a fixed minimum quota. Such a quota can only lead to "forced posting" in my opinion...

At the moment, there are a couple campaigns that have 0 minimum posts:

• yobit.net
• betbtc
• bit-x
• bitmixer
• cryptogames
• btc2bid

I always feel rather sad when a high ranking member starts talking about "yoshit" or "shitmixer" because they think all people pick these campaigns because they seem to have a lower standard for accepting participants while there must be more people like me: people that only post when they want to/have time to post and picked a campaign accordingly.

I'm pretty sure you'll get a completely different result if you would run the same test several times spread over a couple of weeks.
As said before, i think it depends on how many transactions are in the mempool, how big they are, which fees they have, which pool mined the blocks, how big the blocks were,.... From time to time, you also see allmost full blocks for 3-4 consecutive blocks. I'm pretty sure that your very low fee transactions wouldn't have been included in this case.

I've been running the demo of leonArdo for a couple days now, i'm not affiliated, but i do like the way it works, and i also like the fact the dev is really active.
I asked him for a 32-bit linux binary, and got one trough PM just a couple hours later...

That being said: it's the only trading bot i've ever tested, so i cannot compare it to, for example, C.A.T.

There is no limit... Anybody can create as much private keys as they want. They can use blockchain.info, altough i don't like web based wallets. They can also use bitcoin core, armory, multibit, multibit HD, electrum,...

The thing is: it would be impossible to create the private keys for even 0.001% of all the addresses... We just don't have, and never will have enough computer power and storage to store all these private keys. And i'm not talking about "pushing the button on blockchain.info", i literally mean that you can not own enough powerfull servers generating private keys 24/7 to generate even a tiny fraction of keys that could exist.

you can read more about this on this discussion: https://bitcointalk.org/index.php?topic=24268.0

One thing i think you're a bit confused about: holding bitcoin is basically holding a private key. If two people hold the same private key (it doesn't matter if they have the private key stored on a paper wallet, on a hardware wallet, in blockchain.info's database, in a wallet.dat file, in electrum,...), each of the two people can sign transactions, thus spend the coins that are controlled by this (shared) private key.
Blockchain.info doesn't controll bitcoin, they're merely an online wallet, block explorer,... One of the many out there.

If you ever decide to buy one, i just looked it up, and those ledgers are even cheaper when you buy them from India... Very strange, i payed more for a ledger sent within the EU as you would have to pay to get it shipped from the EU to india.

Sure, but i wasn't talking about electrum... I was talking about core and downloading the full blockchain vs using the prune option because the OP said he wanted to reduce the size
Any SPV wallet will be a lot smaller, but these wallets still need servers that actually run bitcoind and sync the full blockchain.

Could you share your country/continent and payment options? A couple of those vendors deliver worldwide, some accept BTC, others also accept different payment options like PP.

I'm going to try the free version at home tonight... Is the linux version 32 bit? (i'm asking because i'd like to try it on my old 32 bit laptop running opensuse 13.1, if it's 64 bit it's no use searching for the power adaptor of my old laptop )
Also, are there dependancies?

I'm sorry, but are you talking about a hardware wallet? Why wouldn't they be secure?
With a hardware wallet, your private keys are not accessible from the web, nor from a pc. They are stored on the hardware wallet itself, i think that's pretty secure. Worst thing that can happen is one of those virusses that replaces the address you want to send coins to when you copy/paste it from a mail or a website. But this risk is equally big with any kind of transaction you want to generate, so you always have to double-check.

For personal use, you can use the prune option... when using this option, i think the blockchain is somewhere around 6-10Gb (untested by me)

I love mycelium, i have it on my android phone, but i do not completely believe it would be safer to keep your coins on your mobile compared to holding them on your PC...
IMHO, the safest place to store your coins is on a hardware wallet or correctly generated paper wallet.

Which country are you from? Most countries i know off don't seem to care about bitcoin, as long as you pay taxes on your deals

They're the best... I used to use an android wallet to keep pocket change, electrum to keep a couple hundred dollars worth of BTC and paper wallets to store my main funds... Paper wallets are great, but you have to keep on making them, sweeping them, trashing them,... In the end, it's a big hassle. Now, i've invested a lousy 18 bucks, and i'll never have to reboot with a live cd, unpack bitaddress, generate wallets, put them on a usb, print them, erase the usb,... Just pop in the stick, open the client and transfer 

If you read the code kn_b_y has produced, you'll see that it's not only possible, but even not that hard to do... If you're not familiar with python, i already gave a basic start on how to solve the problem with perl (altough kn_b_y's version is a lot better, it only produces valid private keys)

I finally gave in and bought a HW.1 just last week... I wonder how i lived without it
It keeps my private keys as safe as using a paper wallet, while i can still use it without completely sweeping it and making a new one. 

I found coinpayments.net very easy to work with... Their API was really clear, and they had plugins for wordpress and shopping carts.
Mind you: this was over a year ago, so other payment networks might have risen since then.

I think you're right on this point, BIP38 encryption is pretty strong (AFAIK), it's not  that fast to brute-force with current technology. However, i would never give my encrypted private key to somebody i didn't know... No offense, but i just wouldn't do that.