Depends on what the app does, of course. I have http://ficwad.com/ http://ficwad.com/ sitting around, with Google Analytics telling me it gets daily users in t

Depends on what the app does, of course. I have http://ficwad.com/ http://ficwad.com/ sitting around, with Google Analytics telling me it gets daily users in the upper end of that range. It runs on the cheapest plan webfaction offers (and I'm making it even cheaper with some affiliate credit...). The only place where it's running into issues is email, which I had to write a little queue system to throttle the sending to keep it under the plan's daily limits while still making sure that the important messages go out first. I could make it fancier and put it on pricier hosting if I bothered to monetize it in any way.