still unclear to me why i would/should pay to publish my runkeeper data into the ether or why i would pay to consume yours...will every user of app.net pay for the service? or is it only some subset who opt-in as donors? if the later, doesn't this create a free-rider problem? also, in that case you wind up with a small minority of donor users who are the customers and who set the agenda, not the majority user base, right? ...if the former, how can this become a mainstream consumer product? normal people don't care about any of these 'problems' and why will they pay for something facebook/twitter gives them in exchange for 'viewing' ads they've learned to ignore?