I'd buy your argument if Ruby on Rails only worked on Amazon servers, or if by using Ruby you could only use nginx and not Apache.

The fact is when writing a .Net web app, if you don't like the way IIS or Windows Server or their providers are handling things, you're out of options. Oh and if you want those nice features that make the ecosystem usable, you get to upgrade everybody to the Pro version (not just the people who need the features.) Remember to buy the next version, too, so you don't fall behind on updates and enhancements. And the next version.