Not a scam. Does sound like a communication error.
Don't get put off. These "free" camping passes are not unique to TT and are out there with others. High pressure used-car type presentations happen at other membership networks too. You won't find an easy to read glossy brochure with all the different types of memberships and full details on it. The TT website only has info. about one year zone memberships and says nothing about permanent memberships. You have to phone them to get that info. TT booths are common at RV shows.
The free passes or memberships are simply a come-on to get you to a presentation. They hand them out like candy at RV shows. We got a free year's membership at one once and the fine print limited it to something like 6 days max., not on holiday weekends and not in the summer. Not worth much. We did buy a membership in that network (Wa. state only). DW is an accountant and used the "free" membership to negotiate a big discount off a new membership and then just before signing, squeezed them for some extras. We did the get up to start walking away routine and the salesman said "wait a minute"... :)
If looking for a TT membership, don't buy a new one. By a pre-owned one and save thousands of $$. That's what we just did and got a top-of-the-line one with excellent features. There's a LOT of things and different features to know about before buying a used or new membership and you MUST do your due diligence (internet). Memberships in a particular network are not all alike either and it depends on what the original buyer negotiated into the contract. If a used TT membership you are looking at, get the membership # and phone head office to get details of the contract. We had one seller refuse to give it to us and got p*ssed that we even asked. Had another that had big money owing on it that the seller (daughter of an elderly parent) didn't know about. You can buy a TT membership from anywhere in the US. We got ours from a seller in Arizona. Lots of steps and hoops to go through but definitely worth it.