I am almost 100% sure that this is not intentional.
The sort “Play Together (10 Robux VIP Servers)” should be renamed to better reflect the recent name change of VIP Servers to Private Servers.
This bug happens 100% of the time. It’s existed ever since the sort was created.
Repro: Go the game page, and scroll down to the sort.
Related: The sort in my opinion should also be instead offering Free Private Servers. It seems to be already doing that! Thus, maybe this name change is not necessary at all, if it gets renamed to Free Private Servers anyways. I’ve written a topic on this here. Go check it out!