I’ve been using Zoome for over a month now, and I’ve claimed the cashback a few times already — so I can give you a bit of a rundown. It is based on net losses, which is pretty standard, but what I liked is that it’s credited every Monday without needing to chase support. Last week I got €56 back after a rough Sunday session on Sweet Bonanza. 😅 That said, it only applies to real money losses, so bonus rounds don’t count. Also, you have to meet the wagering before cashing out the cashback — I think it’s x3 or x5, depending on your VIP level.
It’s not life-changing money, but psychologically it does help soften the blow of a losing streak. Still, if you’re a low roller, the return might be so small it’s barely worth tracking. I guess it depends on how often and how much you play.