That language has been present on the support page for many years. And that’s how it has functioned, in my experience, on many? most? clients.
There’s even a feature suggestion to allow forcing pre-roll videos on users.
It’s interesting that you saw different behavior.
I would have guessed that a client setting was simply lost, but some have stated that a previous version of PMS behaved differently. That’s … 
It sounds like you would prefer different behavior, and might consider voting for that feature suggestion.
