I've found Quora pretty active, but I just use it to offhandedly ask dumb questions like "if Easter is so good why isn't there a Wester" whenever I think of them.

Half the time the answers are actually very educational and the other half it's a Facebook-style reply where an old person yells at me because they misread the question.

The one exploitative thing I've noticed is there's a "partner program" that pays you to ask questions, but it seems impossible to make more than 10c off it in a lifetime.