The workflows of Phabricator, having Tasks as Issues and attaching patches to them is way archaic to how people who are used to Github do things - they fork, make changes, and submit merge requests.
If you want to solicit outside contributors you pretty much have to support this model or you will lose a sizable fraction of potential devs.
If you want to solicit outside contributors you pretty much have to support this model or you will lose a sizable fraction of potential devs.