I wonder if the results thus far actually validate the concerns raised by YC ("hard to know whether people are willing to pay")? $250 MRR strikes me as rather low for 35K MAU - assuming that's 50 users it's just over a 0.1% conversion rate, and a little over 2 weeks in I'd expect most of those monthly users to have come across the option to pay at some point by now. Nonetheless, wish you guys the best of luck in figuring out the monetization!