I'm new to DVCS, and I recently setup a Bitbucket account which offers free unlimited space and repositories. Github does seem to be far more popular, though. What makes Github better and worth paying for?
Github Pages are really useful. Maintaining a project site is really easy when you can just create a gh-pages branch and push to it to update your site.
Also, network effects are undeniably part of the appeal. I'm much more likely to hack on a project or library if I can fork it on Github. It makes for a nice workflow.
I don't know anything about the guys behind Bitbucket. I have used a ton of software (not to mention config files!) that GitHub puts out as open source. So I support them.
Oh, and the interface is gorgeous, BitBucket's feels really tacky. There aren't many outages, and an outage has yet to actually affect me.
