The files are hosted on AWS S3 (despite the fact that their domain is "cdn.lts.cr", they're not using CloudFront), so assuming a cost of $0.14/GB (too lazy to c

The files are hosted on AWS S3 (despite the fact that their domain is "cdn.lts.cr", they're not using CloudFront), so assuming a cost of $0.14/GB (too lazy to calculate it including S3's various pricing ranges that come into play when more data is being stored), and completely ignoring facts such as cost of hosting the site, and the time factor of creating and managing the site... Also assuming that all free users use all of their 200mb, and all pro users use all of their 10gb... They need a free-to-pro conversation rate of 0.37% to break even on the S3 costs, i.e. one pro account for every 271 free accounts. Alternatively assuming that all users will use 50% of their 200mb or 10gb, then that's a conversation rate of 0.17%, or one pro account for every 593 free accounts. My guess is that, if we ignore people who try it out and then decide not to use the service, chances are that, of the people who stick around (i.e. the people who will actually store more than one test file), quite a decent number will move to the pro account. So yeah, I can see how they are making a profit, seems like it could turn into a nice (and really easy maintenance) little cash cow. On a seperate topic, would be amazing if someone created an open source version of this as a front-end for S3 - though I'm far too lazy to do it myself. edit: I see the creators are reading this thread, so here's a direct query. Any chance you'd create an account for maybe a few dollars a month (less than pro) that you provide no storage for, and that gets hooked up to an S3 (or S3+CloudFront) account of the user's chosing?