Sounds like you've covered all the bases, including shutting down your service, but you've rejected every option that doesn't involve selling out your users to advertises. It comes off as a sense of entitlement that you have some sort of right to profit off this service when you don't.
I don't sense much entitlement in thoroughly thinking through the options of how to keep a website running.
Actually, the air of entitlement I detect in this entire discussion is around people who strongly believe that everything should be free and magically self-sustaining.
