I can see how to buy forge points but how can they be used to buy supplies or good. I can only see barter from one form of goods to another but no way that the FPs can be used. Only diamonds can do that and real money has to be spent to buy the diamonds. The coins can't buy goods and one can't have more than 10 FPs and they are restricted to research so I'm very interested for you to explain how to do it.
Its very easy.
1st... FP's are NOT restricted to only research, you use them on GB's as well.
Lets say player A needs goods from an era far above his, he makes a deal with player B to do unfair goods trades and then compensates player B by placing an agreed amount of FP's on player B's GB's. ( he doesnt actually buy the goods directly, but indirectly )
2nd, you can have hundreds of FP's in your FP bar. It maxes out ( in theory at 100 )
If its at zero, you will get 1 FP per hour until it reaches 10, then you stop getting the free FP's. BUT if you leave it at 10 and collect from your city it will go up until it reaches 100, UNLESS you are maybe at 99 and collect from a building which ( for example ) gives 10 FP, then your bar will go to 109.
OR if you use diamonds to mass collect and you are at 99 FP, it will collect ALL in your city, the bar is then technically unlimited.
3rd If you go into your inventory and use FP packs, your bar will climb until your stop, again in theory bar is unlimited.