[mikekchar]

I think it's a slightly different issue. A UX designer usually does not have the ability to run a project independently from the beginning. A programmer can, even if it results in a crappy UI.

Successful open source projects don't usually start with teams. They start with programmers with an itch to scratch. It's hard to get investment in a group of people. Everyone is always keen at the beginning, but drift away as the realities of the daily grind kick in.

So if you are non-programming UX person, you are dependent on a programmer who might not stick around. Then you are shopping around for programmers (which never show up). If you are a programmer who wants a UX specialist, the one you start with usually wanders off and then you are shopping for a new one (which never shows up).

The result is that programmers develop a culture of building these kinds of apps and UX designers don't. Even if a UX designer shows up late in the process, they now have to fight all the programmers who have gotten used to making the decisions. And one of the perks of running your own project is not having to listen to other people. If you want to do what other people tell you, you can get paid a lot more ;-).