OverrideEngramEntries=(EngramIndex=???,EngramHidden=True,EngramPointsCost=3,EngramLevelRequirement=2,RemoveEngramPreReq=False)
Count from start of engrams 1 left to right, all the way to that engram. Then you can hide it, so no one has an option to make it. Only way now is to summon it in.
Hope this helps.
He told you the truth in the first post... Nothing Changes! He just wrote it in a way people think they are getting something more (new tier) when all they are actually doing is allowing more people on that server.
Otherwise you would have an IP change and data xferred to your "New Tier" because it has a better processor/computer.
The post by Ryan is accurate... Nothing changes just slots. Same PC, Same Ram, Same IP, Same everything except instead of 10, you have 20.