I would like to suggest that we could maybe allow buying plots on the creative server, for vote tokens. I would say 100 vote tokens would be a fair amount for an extra plot at whatever rank you have. Although there could say be a limit where you could only purchase X amount (I would say maybe 3-5) of plots depending on your Build/Donator Rank.
There would be no real way to make it so that it would consecutively add onto your plot amount only reset it. I may look into this in the future but for now I am going to have to deny.