A lot of the fast-fast guys just don't spend a lot of time screwing around on the internet. I know a few, and they're just not around online all that much outside of some private FB group messages.
I don't trust automated cash washes at all. There's no one regulating the pressure, there's no way to know what chemicals they're using, how hard it's going to be on the paint, if it could/would damage the ceramic coating (if you have that), they're not going to cover any damage if something...