you're both correct, xapo does pay the fee for you. This doesn't mean there is no fee to be payed, it just means xapo pays the bill. Personally, i'm rather weary of such services, if you're not paying, you're the product...

I don't know how they do it, but in order for their business model to be successfull, they have to make money from your account if they're willing to pay for your fee.
This is just my personal sentiment, it's not backed by any mathematical proof.

depends...
the recommanded fees depend on a couple of factors:
- the number of inputs used to create outputs
- the number of outputs
- the age of the inputs
- how long you're willing to wait (on average) to get added to a block

both the number of inputs and outputs make up the transaction size, the bigger the transaction size, the more fees will generally be needed. The size has nothing to do with the ammount of coins you're trying to send!!! it can be cheaper to send 100 BTC in a transaction with 1 input and 1 output than sending 0.00001 btc in a transaction with 10 inputs and one output.

basically,
if you try to use a minimal ammount of inputs and create a minimal ammount of outputs with inputs that were untouched for a couple of months, and you're willing to wait several hours to get included into a block (on average), you can add substantially less fees than when you're using a massive ammount of inputs that were just recently added to create a large ammount of outputs, and you want a reasonably chance of getting added to the next block.

One quick fix would be to let the coins age for a while, and try to generate multiple outputs in one transaction... This way, the single transaction will have a larger size, but the size will probably be smaller than the combined size of the individual transactions you otherwise would have made

Who is giving away these 0.5BTC: you, or the maker of the video?
If it's you, you might want to escrow the funds, that way your giveaway will gain a lot more momentum.

I don't know if OgNasty would hold accounts as collateral. He's strongly opposed to account sales, so he might not like to hold accounts... I know holding accounts as collateral is not the same as selling account, but in case of loan defaults accounts do change hands.

https://bitcointalk.org/index.php?topic=855778.msg13930532#msg13930532

I think you might be better off with people like whywefight or neotox

I'm not an expert, but i think my hunch was correct:
https://blockchain.info/tx/512b84a88f1c07bd55c013f156973855e3d0ae85d517cb549ddf8180762e662e?show_adv=true
1 input of 4.1675, 2 outputs (one 0.1 to 1Myc5HAhMPjq1MatFZaz47gFjjPWc7zJAV, one 4.0675 to 1JCswiVV4SeypsqwXXAFRX85Pe7fGNMPfV)

Since you clearly indicated you were trying to send 0.1BTC as a test, i think it's safe to assume 4.0675 was sent to a change address. I'm reasonably sure the 4.0675 output will pop up as in input as soon as your wallet is synced..

btw: at the moment, this transaction is unconfirmed, you can see in your receiving wallet if there is an unconfirmed incoming transaction? I think most wallets show those.

Well, you probably used an 4 BTC input, and created a 0.1 and a ~3.9 output (the 3.9 going to a change address). Maybe your wallet behaves weird because it isn't synced, so it doesn't see the change yet.
Could you show us the tx id? at this point i'm just making an educated guess.

Are you sure you're not mistaking? Maybe you have two blockchain.info accounts (i presume this is your wallet, since you're talking about the blockchain, and about logging in). I cannot see a single input...
This means it's not the work of a hacker, virus, keylogger,... The address just never had any inputs, hence it is empty.

"The" blockchain isn't down, it's a decentralised ledger stored on thousends of servers and pc's... blockchain.info might have problems (i don't know, i haven't checked).
If i look at this address with a different block explorer:
http://blockr.io/address/info/1YNG7ujEh14ospWf8BHZLSEv4DUW1CtS1

It looks like it had 0 inputs, so it's empty.

I've got Sentinel installed on my android phone. I loaded all my xpubs (eletrum,ledger HW.1, old adresses, vanity adresses,...) and i open this application at least a dozen times each day.

I'd suggest to either use testnet coins to test it out, use use a very cheap altcoin (for example dogecoin) for your tests (0.01 BTC will buy you over 28.000 DOGE), do not run this script with expensive altcoins or with a client on the bitcoin mainchain!!!

I'd personally would advise anybody to be careful with web wallets. The thing is that you're not 100% in controll of your own private keys, so you're not 100% in controll of your own funds.
Like i said, and Patatas confirmed: if core is to heavy for you pc, you can always go for an SPV wallet (electrum, multibit HD,..)

Seems like you opened two topics on this:
https://bitcointalk.org/index.php?topic=1484397

Please lock one of them

If it's just for studying, this one should do: https://github.com/felinegambler/BitcoinDice/
Don't run it in a production environment, there are several exploits for this script... Running it for real will get rid of your bankroll in days!

Just to clarify: an SPV wallet IS a bitcoin wallet, just not bitcoin core
It's still a piece of software that manages your bitcoin private keys, and adds some coin controll. It still keeps all your private keys on your own pc, so it's not an altcoin wallet, nor a web wallet...

I'd suggest using electrum if you really have that much troubles running the core wallet, don't forget to write down your seed words and use a strong password (the seed words are used to restore your wallet, so you don't have to backup your wallet.dat anymore, just keep the piece of paper on which you wrote the seed words safe... Anybody getting their hands on those words can steal your coins!!!)

If this is really an issue for you, i'd go for an SPV wallet like electrum or multibit HD. They only sync the headers, so it's really small, while still relatively safe.

I've just sent an invite to Magicisme and i'm still waiting for letyouearn2.

I have one extra, so i'll give it to alesx.onfire since it looks like he's doing a lot of business on the forum, so he might have some good use for a keybase invite.

So, basically, i'm waiting for a pm of letyouearn2 and alesx.onfire (a PM with their email, to receive the invite).

I'm locking this topic since i have no more invites to give... If i ever receive more invites, i'll reopen the topic!

Sorry,

kinda forgot about this givaway (i've been busy irl lately)... If MagicIsMe and letyouearn2 can kindly send me their email addresses trough PM, i'll generate two invites and send them

Quoted, in case you ever need to refer to your public key in the future 

bump
If nobody else speaks up with better reasons to get an invite by tomorrow morning, i'd probably give the the keys to MagicIsMe and letyouearn2 since they had the best reasons so far

I do think this is a valid concern...
If you waited untill the blocks were pretty full for a while, then sent coins to your steam wallet with very low fees (so on average, you reasonably assume be sure they would take hours, if not days, to confirm), buy a game, sell that game for BTC, then double-spend one of the inputs => you might have found a way to scam the buyer of your steam game...

Offcourse, it'll depend on the policy steam has around this problem... Will they block a game that has been bought if the inputs are double spent, or will they take legal action agains the initial buyer, but let the second buyer keep his game. Also using an escrow to hold the funds for 1-2 games might make the risk a bit more acceptable for the second buyer.

I'm pretty sure they'll leave their zero-confirm policy once this has happened a couple of times tough.