> don't know the ROI. It's hyperbolic, I'll freely admit that.

Being a bookie is making a market. As long as you do your maqth right, your potential for losses are capped--lots of small bets are actually less risky in this respect. Problem gamblers are a cherry on top, far from essential to any gambling enterprise, particularly not one making a two-sided market.

> We let problem gamblers gamble more, and it's not fair pros take advantage of that dark pattern

The pros are the beneficial bacteria checking how much the apps can prey on the problem gamblers.