&gt; Has anyone really thought of this? Do people just happen on to a github project because &quot;it is on github&quot; or because someone linked their work and people liked it and wanted to contribute?<p>I happen to have a BitBucket account, so I can&#x27;t speak directly to your point, but I&#x27;m less likely to file issues on a project if I have to register a new account with their bug tracker to do so.  I imagine the same would apply to a project hosted on BitBucket if I had a GitHub account but not one on BitBucket.