Sell BPs to Inno for rewards? like FPs packages, XXX coins, YYY supplies, ZZ goods, Self Aid Kits, etc.?
not trading them to another player?
That is a different and interesting idea.
Quite frankly the only possible trading system for BPs will be with Inno, not between players.
But due to the Arc being so lucrative already I don't see Inno increasing its value in the game by then allowing you to see the BPs you get from the Arc back to Inno.
to avoid abuse like colo BP's against Arc BP this kind of market should be like only BP from that GB against BP you need from that GB with a small cost of corse
While that is true, that needs to be a prevention added, the only way this can be a thing is if the Arc is eliminated entirely from the scenario. So only non-arc players would be able to use the BP market. Otherwise it can never be balanced while the Arc is in the picture. Which would then of course result in a lot of "but that's so unfair!" cries from those with an arc
Edit: Removed last bit of comment as the math was wrong