the issue with buying plots and obtaining novians and making a supposide profit realy is not a concern.
the purpose of the novians is so that a person that owns a plot can deconstruct and perhaps build something else on the plot or obtain 80% of the resources and then use the novians at a future plot.
if one buys a plot and obtains novians the novians were paid for when the person bought the plot.
as far as a person making a profit from selling the novians this takes two people to participate. the holder of the novians has to take ownership of the plot place the novians then return the plot to the owner that contracted the novian supplier. the person that owned the plot prior to the novian placement would be the one paying for the novians to be added and as such would be paying for a service of delivery of the novians. this does not any any interfere with anothers game play and while the novian holder may potentialy make money from placing novians -- they can not make the money unless another is willing to trust them and pay for the dilivery of the novians.
simply if people dont pay for the novian placement service then the only thing they can use novians on is plots they own and hence not make a "huge" profit. if someone is willing to trust and pay for novian placement that is their choice -- you are at that point paying for a servie to the other player to deliver and place the novians.