I have completed this join up offer for gamebookers through a referral. I deposited £150 and the bonus meant I had to wager around £800. This was done at odds of 2+. As there was no busting out on this offer I had the unforunate luck of needing to keep depositing into my account to carry on.
I deposited with moneybookers to avoid any charges along the way.
Apparently they verify your account on the phone but as I signed up at 2am I avoided this!
Because I was lucky enough to have a big extra money I did my bets in increments of £100-£200 at a time depending on the amound available at the exchange. This took me 6 bets and and just over a week to do so.
A very neat little offer that I am glad I did! Espcially with the no win loose offers and other bonuses currently being thrown at me!!