It can very well be luck.

Let's say a tipster has awesome tips and if you go all in on all of them, you will get 10x your money after a winstreak of 15 tips.

What are the odds of a tipster getting these many right you ask? Well, 1/10.

If you give me a list of the odds of each bet he made in a 15 W streak, I can mathematically show you the likelihood that it was pure luck. Considering the number of tipsters on the forums, the likelihood that one of them has awesome luck is not that unlikely...

Scamming despite provably fair is possible.

Example: I bet high every time, with the same client seed. The server now knows I bet high and knows my client seed. The server now choose a server seed which would give a low result. It hashes this and displays the server seed hash.

The server does not change anything after I have bet, but by assuming that I don't change from high to low and don't change my client seed, I will lose.

Primedice actually used to have more issues (maybe still does) where even if you change from bet high/low, there's a chance they can still mess with you.

It is impossible for any provably fair site to scam you if you change your client seed after every roll.     
If you don't change your client seed it is possible to be scammed, as TF had outlined ages ago (https://bitcointalk.org/index.php?topic=253144.0)
Still unlikely they are scamming you, but you can guarantee that they can't by changing client seed after each roll.

Well, I've gone all in in poker, but that's all
I recently bet quite a bit on a football game at 1:5 odds and came out winning tho... But I still wouldn't suggest going all in except in a poker game.

Not everybody gets completely addicted to gambling. You can gamble considering the money you spend on gambling in the same way you consider the price of a movie ticket. You know you probably will lose, but you enjoy having the chance.

Sure, if you have a problem with gambling it may be wise to not gamble but if you become "rich" it may be okay to keep majority of you money in a bank/somewhere safe and vow not to gamble it, and only gamble away a small portion.

Most giveaways are low to the point that making dummy accounts isn't worth the effort. For example, primedice gives away 0.000002, which is a bit under a tenth of a cent.
As far as I know, giveaways offer people a way to test out the site before putting in any money of their own. Maybe to see if they find using the site fun before they deposit any actual BTC.

The biggest problem with creating a new dice idea is that you need to somehow be trustworthy enough and have enough of a bankroll to attract whales.
With a 1% house edge, most sites will struggle to stay afloat. The huge spenders will generally go to established places (JD/PD)

For you to be able to make any new dice game, you have to be willing to run on almost no profits for some time as most people putting in money won't even come close to the amount of money you lose by giving away things to try to get new users.

I know what your issue with blockchain.info most likely is.

If you accidentally put a space after the amount to send, it detects it as invalid:

"0.001" is valid but "0.001 " is invalid.

Even though the difference is impossible to see without clicking on it and checking, blockchain.info gives an error.

I would like to apply for this signature campaign.   
I have been inactive earlier, but I should be a frequent poster from now until September.

Do you have any deals active like the 25% off on advanced package you had earlier?

I want to buy hosting for only email (mostly forwarding only) for 12 months, and I'll need somewhere between 5-10 accounts.
Could I upgrade the hosting midway through if I need more email accounts?

PM me.

Let's say I pay you to make 10 posts, and another person pays you to make one post.

You post my 10 posts, with my signature in 2 days. Then you post the one post for the other person, with their signature.

As soon as you switch to the other persons signature, the signature on all the posts you made for me changes too.

Big signature campaigns can pay per post because they know that you will use their signature till the end of the month, so their advertisement will be visible for an entire month on all your posts. In this case however, I can't even be sure if my advertisement will last a day, because you may just post really really quickly and switch to someone elses signature.

No advertiser will buy this, as they are not guaranteed advertisement for any length of time.

Game link received, and activated with no problems.

Payment sent: https://blockchain.info/tx/cb597a7b9ae5c9885cbb27edf92309bacf4274f103c89916d8df0af219370f46

PM me the steam gift link as soon as you can.

Escrow takes too long for my liking.
I'll go first, post your address here.

Coinbase says BTC = 410.82, so I will send you 0.0158 BTC to the address.
Have the key ready if possible.

I'm interested in buying a copy of CS:GO.

Add me on Steam, my user id is: http://steamcommunity.com/id/beingmeftw/inventory/

I'll go first presuming you have the games in your inventory somewhere and don't have a negative steamrep.

I've tried this, but for some reason I keep getting an error saying that the odds have changed despite attempting to refresh and retry.
Any solutions?

EDIT: Nevermind, it turns out continually trying eventually works.
Look forward to winning and hopefully not needing this promotion for a cashback

It's not necessarily phishing, and not necessarily something to worry about. I recently got the same mail and just found this thread on it. All links in the email I received link to blockchain.info. Gmail reports that the email was signed by mail.blockchain.info, also owned by blockchain.info.

What caused this? Most likely the fact that I used a really really easy to bruteforce alias (6 chars long I think?).
This does not mean anyone has your password , I tried using a VPN and logging in, blockchain.info asks for a verify email after only providing alias

How do you prevent this from happening again? Change your alias to something longer.
I don't know how to remove an alias, so I've changed it to something arbitrarily long that I won't remember but won't be bruteforcable either. (You can do this if you want to remove it, make it long and random)

As Mexxer said.

Please sign a message with a timestamp from an address holding atleast a few hundred dollars worth of BTC.
Otherwise, your claims to have 2500$+ don't hold much weight.

You deposit to the address either by scanning the public QR code or keeping the public key with you before printing.

The biggest worry is always that someone will gain access to the wallet you have created, either from your computer or your printer.
Ideally, you would inspect the code of the program to generate your wallet code, disconnect your computer from the internet, print the paper wallet, delete print queue, format PC to remove any traces of the file being printed.

You can omit any steps, but that is the paranoid version I've just talked about.

Parlay gives you a small chance at some huge winning, while straight is for when you're relatively sure and want to win.
I'd say, entering a Parlay is more similar to gambling on a game with a big jackpot. Low odds of winning, high multiplier. Hard to skillfully win too.

However, with a straight game, if you have a good idea of who is going to win, you can almost definitely get profit. I'd guess a parlay introduces more variance, as I've seen most people running pick threads telling people to only play straight.