I feel like labeling is probably the best approach here. While I personally hate the business model of "Gatcha" type games and wouldn't mind if we banned lot boxes, it is a model does seem to work for a lot of people.

I also think the odds should also be not only disclosed, but made prominent

Labeling and filtering. It's much the same for various app stores. Just let me filter for "In-app purchase", if you have that, I'm not interested anyway.

Consider using Google.