https://mojang.com/2014/06/lets-talk-server-monetisation/

So it breaks down as such:

What You CAN do
Sell ranks with non game changing elements (e.g. /hat, /me, /nick), Charge players to be able to play on the server, Accept donations that don't get rewards

What You CAN'T do
Sell ranks with pay to win perks (e.g. /mc, /enderchest, /disguise), Sell in game money or website points, Make special kits for donators

So what does that mean for those of us who have purchased VIP memberships? I myself, wouldn't mind a small monthly subscription to help pay for the server, but that does mean folks can't buy Noobz anymore and the current market will undergo some fluctuation as those with a lot of Noobz hang on to them, while others make use of the /shop and sell stuff back to the game for Noobz. I expect to see prices fluctuate as this settles out.

Thanks Lawerence. I know you folks will come up with a plan that is viable and fair.