£20 free chips.
All winnings from this promotion will be paid into a bonus account. The winnings must be turned over 10 times before being removed from the bonus account e.g. you must stake the £20 worth of casino chips 10 times to the value of £200 before withdrawal.
that's a fair assessment.
However, to complete the promotion via blackjack, the £20 has to be turned over 100 times, not 10 times.
Seeing as I've never done this before, I don't know how long it takes to play 2000 £1 blackjack hands. Is it really worth the effort just for £20? Maybe not for some people, but seeing as I'm a lazy student, the opportunity to make potentially £20 for a few hours in front of the computer doesn't seem such a bad idea

PS, the bonus takes upto 48 hours to reach the account, so won't be able to get started until Monday at the latest.