We've never had more than a few dozen active posters at any given time.

I'm not sure I understand what you mean about sustainability. We aren't suddenly in the business of making money and most folks that wander by aren't going to donate.
All we need to do is make the rent to continue as before.

If new members happen to be attracted or if you have friends you think would enjoy posting here, by all means, invite them and point them to the tip jar.

I'm more concerned with maintaining the integrity of ReaderRant than anything else.

Good coffee, good weed, and time on my hands...