In the real world you need a ticket to ride, only in Trainz do you need one to walk.
But seriously, is this not simply a case of having access to experimental features sooner because of a particular membership? I'm sure it will become available for all users at some point. This would normally have been kept hidden for everyone, but certain users who are paying more can try them already. I do not think you and I are missing out on something we would otherwise have got.