"I am willing to pay ~$5-10/mo for a reliable host... Need a repo with PRs and issues, where people can register free account and contribute or raise issues, GH actions CI, and pages host to deploy static sites."
Who wants to build something to acquire that $5-10/mo business? A VPS powerful enough to host a small repository costs more than that these days. There's no opportunity here for someone to build a Github alternative and make any money. The best parts of Github that make it worth using in the first place all come down to the size of the network and that would be extremely difficult to replicate.
It comes down to wanting to develop a SCM hosting service and hitting a $5-10/mo price point. To put that in perspective, people pay more than $5 for a latte and COGS on that is about $1.50 or less. A good customer will come in weekly or more often. I'd rather sell coffee than SaaS SCM.