Bonanza was my go-to with a tenner deposit, on 20p stake. Lot of times I managed to get that tenner up to £50, £100, £200….it’s at least 50 spins at 20p and in reality, you’ll probably get at least 100 out of it if not more. Book of Ra or Captain Venture on 10p for 100 spins is also a reasonably good bet for a profit out of the tenner, though you’d be very lucky to get past about £20 off a single feature on those.
Of course, there’s always the possibility zero is due…. 😀