with mtg cards, they drain your money so that kind of works too. But rescuing animals or learning something doesnt apply here because it doesnt take anything from you (unless you are kind of insane). Or rather they dont cost too much in terms of invaluable resources like your mental or physical health, just your time which you have to give to everything anyway. Stuff like drugs diminish you being able to enjoy other things and drain your health and relationships. Even if you keep those under control, it still takes something from you, just a bit less.

Though anything can become an addiction too, but if positive things become that then you might have other underlying issues rather than those things themselves causing it.