While I agree in principle with the idea that we shouldn't be freeloaders, there is another side to it.
I used to put a dozen hours a week into unpaid tech support for all comers, just because it was fun and it helped out the community. When I moved away, I started doing other things (volunteer firefighter, etc.)
My brother pours tons of work into his custom birdhouses and they are very popular. He absolutely refuses to take any compensation because it is a labour of love.
I don't expect that any one instance will remain available and viable over the long term. If things look dire or the mood strikes me, I'll look into spinning up an instance, just as part of being a good citizen. I assume that human nature will ensure that there are plenty of people like me.
I'll kick in a few bucks here and there and human nature means that there are plenty of others doing that, too.
Never underestimate the drive of someone with a hobby! Hell, I wish my hobbies ran to only a couple of hundred dollars a month!