you save a lot more than just deploying rails. You no longer have to administer a server, and don't under estimate how much work that is. You can create a serve

you save a lot more than just deploying rails. You no longer have to administer a server, and don't under estimate how much work that is. You can create a server and maybe get away with administering it for a year or two, but eventually it will bite you in the ass. The question people have to ask themselves is at what point is the cost of these services greater than the cost of administering their own servers. My feeling is that these services are great if you're running a small to medium site. If you have a large site, or run lots of small sites, or some combination, then you're probably better off doing it yourself.