Other than that I'll answer the questions some of which already have information on website or the installation or product walk-through videos.
how much it will cost you to run on whichever cloud you use: Hetzner being the chepeast at the moment ~$4/mo. Ofcourse your own hardware $0/mo
will this software get updates to support new API versions or other changes these clouds might make?: So far I haven't seen a cloud provide deprecate their APIs (please do provide real example if so) but this would be handled as software update
Will it automatically support new regions?: Via software updates
Will it automatically support new instance types?: Yes already supported, more info on website and product walk-through video
If you'd like to have civil discussion other than calling "scam", futher questions are welcome