Actually, you should have named this 'how long can I survive on bootstrapping'. It seems as though your answer is 'not much longer' at your current trajectory. So you need to change something. It sounds like you couldn't afford to release a free version, with all the costs involved. So don't. Stop releasing the free version. Think of a price you would be comfortable charging for it. Now double that price. Chances are…
+1 to dropping the free version. It sounds like going the free route was a mistake. Bootstrapped startups have to charge something to somebody, and you-pay-me-for-my-product is a time tested way of doing it. As for the rest, you need to tamp down your costs. $30/day is extremely high for a bootstrapped, no-revenue startup. Find a way to cut this down. Based on your comments about GAE and SQS, see about moving to a st…
Also, we ran into the surprise of discovering our potential userbase: the 12-18 crowd stormed in like bulls in a china shop posting sexually explicit pictures, profanity, etc. which created a whole new slew of headaches. It's a valuable/lucrative audience, but you need a fair amount of policework to prevent things from getting out of control...