I’m not sure about that. What if advertising were used to cover server costs, just like donations right now? Then the community may be fine with it.
But I think it’s very dangerous to go down that route. Because it’s going to become about higher profits, not just covering costs, in the long run.
I don’t know either, but so far not a single instance has even tried to my knowledge. I have a very hard time imagining people being okay with it.
As long as the ads are good ads, I’m using Adnauseaum to block most though.