How can it help with money? They also said footfall wouldn’t depend on beacon size:
Additionally, prestige is worked out using percentages or ratios, meaning that a building with more blocks wont necessarily have more prestige with a smaller building, depending on the block types and tints used, meaning that what prestige really depends on is having interesting blocks, shapes and colours, all of which have no real world money linked to them.
There are all sorts of limits to how much of a prestige bonus you can get, including how much of a bonus you can get purely based on size.
Having more plots alone will not translate to having more prestige, just as having more plots wont amount to increased footfall.
problem solved then? 
maybe you disagree with me about this (probably), if so please explain why you think buying plots would be incredibly beneficial and become p2w, because I don’t feel like it will be.
Also, I feel like I should bring up the point (again) that people have all sorts of different amounts of plots already whether from tiers or just playing the game more often, and I don’t think there are many issues right now with the plots being overpowered.
EDIT: additionally, most of us haven’t used half of our plots, let alone are being limited by our amount of plots. Therefore I can’t really see how much would change for the majority of people if we were able to buy plots, as most of us have no need to.