This job would be Tester (TST) :
-It would be able to group with standard groups depending on it's role (except maybe current "hard content" ?)
-It would also gain a (time limited) currencies as reward for activities (different kind for different content ; with a weekly cap - so people play it, but do not abuse it)
-You can exchange said currency for whatever reward (so people play it) after answering a few questions about the job
-The job skills and roles change every few months ; based on an existing job but with new twists

Players -> profit as rewards
Devs -> profit as feedback