30Bet Casino welcome bonus: are the wagering terms fair?

Lately 30Bet Casino keeps coming up in my head whenever I think about welcome offers, mostly because the brand seems to have a real audience in places like Brazil, the UK and Germany. It holds a Curaçao licence, which is fine by me as a starting point, but the thing that matters is what happens after you claim the bonus.

Welcome deals always look great on the banner… then you open the terms and find the wagering is huge, or that slots only count partly, or that the max bet rule trips you up on the second spin. That's the part I'd like to understand before putting any money in.

So for those with real experience: what does the welcome offer actually look like when you sign up, and does the wagering feel reasonable? Did you manage to cash out any bonus winnings without surprises?