how that can work is 1 expansion every level till level 9 then 2 expansions at level 10. After that it can be 1 expansion every 10 levels.
Maybe they can release a GB that allows players to have a chance at getting Forge Points for every player they aid. Higher levels will not only increase the chance of getting FPs but also the amount of FPs gained from each AID. The passive bonus could be defence that works like deal castle and st basils.
I would be against that.... I'd rather have economy based increases instead of even more means to gain FP.