Just crossed $100 in points on the app Stepbet, so I withdrew my earnings so far.
I put in $200 for bets - two games of $80 and one of $40. I withdrew $233.72 so that makes for a gain of +$33.72.
It's actually $2 extra! Instead of using points for my new games, I withdraw the points & pay with credit card. This way I also get 1% cashback. In a few months I'll look at obtaining a 2% or 3% cashback card. Got a lot of things to figure out to make this viable.
Is it passive? Not really. It has encouraged me to be a bit more active and that's good for my mental health. I will probably abandon the venture once my main gig draws in so much that $30 is trivial to me. Could be a while before that happens!