@atomicpoet I agree that you shouldn't demand people's time and energy for nothing, but there are lots of ways to "pay" — the most obvious being the "karma" or "favor" system that has always existed informally for many people, and has been formalized on some internet platforms. You can also get a surprising amount of mileage out of just having a social norm of trying to answer at least as many questions as you ask (regardless of whether those answers are to the same people).