Quote Originally Posted by LadyVal View Post
I did. They have 5-sec spawns, don't attack unless provoked, require less contribution to get credit, and don't drop rewards.

Unless exp is considered a reward, it seems like it would be super easy to party with someone who can solo a B rank and just sponge up the exp without getting aggroed, and having that large source of exp respawn every 5 seconds.

If exp is considered a reward though, this all is moot.
This part you missed lol

"Rank B elite marks will no longer yield rewards upon defeat.
* Upon defeating a rank B elite mark, players will only receive the reward granted by the elite mark bill in their possession."