It seems to me that players who went for the rinse and repeat option (rather than fresh deposits) are the ones being targeted. I could be wrong but it seems to be a fairly common trend? Not that the t&c's say there was anything wrong with this.
I suspect anyone covering all numbers at roulette with enough funds from the rinse and repeat to clear the wagering for each £100 bonus in one or two spins (or a similar low number) has been targetted too. I'm not sure I've much sympathy for anyone who has done the latter, especially if they have done it claiming the £100 bonus say 715 times (£45 ish 'guaranteed' profit every time).
I suspect anyone covering all numbers at roulette with enough funds from the rinse and repeat to clear the wagering for each £100 bonus in one or two spins (or a similar low number) has been targetted too. I'm not sure I've much sympathy for anyone who has done the latter, especially if they have done it claiming the £100 bonus say 715 times (£45 ish 'guaranteed' profit every time).