As a VIP, you can update your Portrait to an image of your choosing. Your portrait is displayed on your nation page, at a maximum size of 150 pixels by 150 pixels.
We already have that, an example: https://politicsandwar.com/nation/id=67665
I was thinking about how you need to delete and repost the trades on market eachtime you want to change the amount & price.
It would be nice if you could edit both of them in real time, instead of deleting the offer and reposting it.
Something like this:
The idea could work, but not at 10%, that's way to high.
Also you already get 50% if you have 20farms, the more of the same improvement you have the higher % you get. This is just resources & manufacturing improvements.