Yes, and you know when they've stopped following it, because they send you an email saying "we've changed our ToS" [after our legal department learned what our engineers have been doing all year].
I am the co-founder of a small by design company offering cloud services, and we spend a lot of time to make sure that our ToS reflect what happens operationally. Also money since we review it with a lawyer specialised in open source software. There are some other entities from chatons.org that care about such documents as well.
