It would be nice if a freemium game like this provided additional bonuses to those who pay in and keep their bonuses.
Example: 10 countries if you pay $15 and then your minimum increases from 2 but its permanent.
Another Example: Level unlocking for 3 months allowing you to increase your countries level to whatever you can but keep it at the maximum it reaches.
I'm a big fan of freemium games where you can pay to add extra to it (world of tanks, war inc.)
Saying that, the freemium model has issues (quote: "Don't want to pay to fix that dent? See you in eight hours.") usually to try to roll in extra cash and almost anyone would rather pay to assist gameplay than pay to avoid waiting to play or access something they have already paid to use at some point.
I remember buying a game in Game in the uk and I took it back for the simple reason that it required the internet to play but worse than that, it required additional payment to actually play it (Another reason I don't play WoWarcraft anymore too).
I would be interested to hear a dev (Andy)'s perspective on these ideas to introduce a more expansive freemium model to allow for expansion but to prevent missed subscription problems. It would also be interesting to see a gold shop where you can trade gold for all trade items instead of using country cash.
I should probably stop typing suggestions now but thanks anyway.