I think you misunderstand what ghost is. It's not a cloud service. It's a CLI tool that runs workflows from your GH account: https://news.ycombinator.com/item?id=47982915

The multi-provider angle is an interesting future direction. I built it atop Actions because that's what I use everyday, but I'm sure other similar things exist.

The main driver for me was I always felt actions had so much potential for a modicum of easier use, that would give huge benefits to my workflwos. Ghost CLI is that little bit easier.