Be happy a dungeons and dragons RPG which is about leveling and dungeon running has a system in place where you can pay to level? This screams, 'our company will sell its soul and do anything for money'. Typical perfect world experience.
I feel if this is working as intended it is a huge downfall to pay your way to victory - unacceptable and a cash grab tactic. If it's a bug, it's unfortunate and needs to be fixed