The upcoming changes sounds good, but not good enough.
Why?
It is suspicious when i'm reading here, that some player owned more than one stall, and they are take pride in this.
Not only that it is not possible for later players to get a stall, the 20? stalls in city seems owned by 10 player or less.
This is what developer should prevent.
One Account should only be able to own 1! stall at the same time.
Also should the longest time to rent a stall limited with i.e. one day Cooldown to rent the next stall, so that other players have a chance to rent the stalls who havent chance yet.
That would be fair for all players, not to raise the Tax or Fee, because the player who have stalls at this time surely have no problem with raising fee.