Hi, I haven't followed this one up or read the stipulations but normally if you have to "deposit" £10.00 you have to play it through, all the deposit. I just normally jot down each spin and stop when I have got to £10.00 spent.. All the better if you've had a win but if you are left with a small win below withdraw threshold I just play iit out. I always find bonus terms a bit difficult but if you are a casino pro (unlike me) you can usually decide on judgement whether you accept unless it's stated in the cashback website. I don't think I'll risk a £20.00 wager at a site I don't know in case the cashback fails, or at least until there are more user reviews on the cashback site.
MATCHBOOK CASINO currently have a 100% match bonus and 100 wager free spins so it's a good offer. I wouldn't want to advocate betting but if you are into doing this already it seems quite good.Its still available on TopCashback but only for the casino section.