How about instead of extorting DP from "High" Reborns, how about suggesting more useful things into the Mission HQ. I know "extorting" is kinda of an extreme word let's be honest now many people use the perks, such as...
Amulet of Ru
Blog Permissions
Good Luck Charm
Inn Coupons
Other debatable yet situational
Travels
Forest Fights
Healing discount
I think it can benefit more if you think of more useful perks to spend with DP rather than raising the usual Bio Avatar, Weapon/Armor name, Coloring Name, Titles.. etc