Alright, this trips a lot of people up at first. The short version is that bonuses always come with hidden maths, mostly different wagering weights per game type, so slots usually count 100% while table games often barely move the progress bar. Most platforms try to explain it but bury it deep in terms. You can find clearer breakdowns of how wagering contributions usually work On this page and it basically comes down to game categories and T&Cs reading more carefully than you’d like. Honestly, once you get used to spotting excluded games, it becomes less painful, but yeah, it’s not exactly beginner-friendly.
Yeah, bonus terms can feel like a trap at first. Easiest way: stick to slots (usually 100% contribution) and ignore low/zero ones like blackjack. I don’t skip bonuses, just pick simple ones. Playfina is pretty clear on rules, which helps a lot.