In the near-term, a better idea might be to establish an alternative under a co-op model, like Subvert is trying to do for music as a Bandcamp successor. Vendors are part-owners of the entity and have input into its governance. Any code should be open source, too. Federation would be great to later help turn it into a truly resilient global platform.

I am using Dynu. It works fine and it’s free, no complaints. Their app for Linux to update periodically didn’t seem to work well from my experience, I just set up a cron job to do it instead.