I also got this survey and I had the same feeling. It felt more like a patron for their game preservation program with possible features like a members-only-community, interviews or documentation about the preserved games, their publishers/studios and the efforts to keep them running or some kind of loyalty rewards/discount coupons. Maybe even ‘special builds’ like ‘experience the OG version 1.0 of $game’.

There was one option, that I interpreted like ‘maybe we will put future compatibility updates after purchase (e.g. supporting Windows 12 or whatever) behind the membership’ - but that’s purely my interpretation of a single bullet point style line in that whole several page long survey