Or simply allow people to donate to their instances. Why does everything have to be done through ads?
My home instance put up a donation request because they had to upgrade the servers. They got enough money to cover costs for the rest of the year in less than a week.
Reddit used to do the same thing, have donations to cover costs. Ads are evil, and as a society we should be pushing back against them, not encouraging them at every opportunity.
Come to Pennsylvania, we don't have acceleration lanes on most of our on ramps. It's nuts!