While I'm not a target customer I'm sure you'll find early adopters thanks to YC&TC. Launching is hard, so congrats on that. That being said, I am still trying to wrap my head around the whole 'limited sharing' trend. Path got the ball rolling and has gotten pretty popular. Then came the sharing between couples - Pair, cupple etc. (seriously?) And now no sharing but just journaling for yourself ? How do you guys make money ?
Charging for the app would be the best way, although if this becomes venture funded then then it will be hard to just do that given the pressure to support a high valuation (see the recent google acquisition of sparrow)