Well, I think it's a very good idea, you could implement it quite well that way (the airdrop merits don't count there, of course?), and that way the hard-earned merits are really rewarded. You could try it for a month on a trial basis, with this kind of payment. In addition, newer active and good forum members can join without the activity rank.

Good idea from another dedicated campaign manager, keep it up Icopress.