Storage for Fun Maps (Pack Owners)
Keeping in mind that the selection of fun maps will expand in the future. People won't be keen to stick to one map only and then needing to purchase additional maps again.
An alternative suggestion would be to give Settlers, Colonist and Founders "Storage Slots" where they can pick 1, 2 and 3 amount of maps monthly out of 6 available maps (total fun maps: 17 currently) in addition to the Free Map. If not monthly, it's possible to switch to bi-weekly.
Having the options to access everything reduces the value of these fun maps. It goes against the concept of Less being more / Paradox of choice. Hence the proposal above about only offering 6 maps to choose from.
Settlers: Free Map + Selection of 1 Map
Colonist: Free Map + Selection of 2 Maps
Founder: Free Map + Selection of 3 Maps
I think that you should definitely have access to all of the maps that you own! Not just 6 of them!
It would be a rotating system so you technically do have access to all of them in a sense in the span of a 3 month period (18 maps).
I understand that would mean that you wouldn't be able to keep a certain maps after one month but that's what would keep it more interesting in the long run.
Or provide purchasers with all of the fun maps. As many were under the impression that was going to be the case.
It would be detrimental for longevity of the game. It's a bit like having a game cartridge with 101 games as opposed to a small collection of desired games.