I am unable to find a free service, or one that is generally affordable. They seem to be snapshot based, which is fine considering the bandwidth required. If we or someone created a plugin for one of these services, the customer (you) would have to create an account with that service and pay the membership fee - which makes sense considering there's a pile of technology behind it, and i'm sure that matters to their development team to get paid

question is, which one do we choose... if any - or do we just make our own lol