There is nothing to stop someone IC or OOC banned from adopting TEP’s name in other games in the first place. This policy does nothing other than provide support to any good pioneering TEPer.
For the legal technicalities, providing secrets through Roblox would be related to NS, and so it would still be tied to NS. The Concordat does not have to name the site, it is obvious that it means the Concordat is the constitution for the government of the region of The East Pacific on the site of NationStates. ‘Nation’, ‘region’, ‘eject’, and others. The most obvious references are A.7 and A.8 relating to taking the Delegacy through means not specified in law and recruitment from Frontiers. A TEP government for another game would need to be included by amendments to the Concordat so it can apply beyond one game.
This is my reading of the law.