Who needs to pay when you can startup a simple droplet / linode instance / lightsail / <VPS> of your choice and setup phabricator. It's not exceptionally complicated, written in a language that doesn't require complex configuration, can poll repo updates from remote servers, can additionally host repos. Also used by some major companies & open source projects. Uber, wikimedia, freebsd , redhat, KDE, Blender, Dropbox, Quora, Disqus, Khan Academy, LLVM, Cisco Systems, Bloomberg. So it can't be that bad.. I use it every day, gets the job done, and I don't have to ask someone else to do a pull request.