In that case, it's not really important what the provider runs.
As others have said, once you turn over control of your data, you're at their mercy whether they run free software or not.
It's a shame the "Freedombox" being developed by Eben Moglen and some Debian people never took off. That was supposed to be a totally free OS running on a little low-power "plug" computer, that would run various servers 24/7 for the user such as email, social media, VoIP, etc.
