It also makes you feel like a beggar, panhandling for change. Is that really worth it? Why be perceived that way, when you don’t want to be?
If people really have absolutely no time to contribute, that’s fine, they just passively benefit. That is how open source works. And even by running or merely using a Discourse you indirectly contribute to the ecosystem and expose yourself and others.
If we make a good product, then there should be natural ways to pay, and there are. If we do not make a good product that inspires people to support us, then we deserve to fail.