That's your argument? That you can't keep your dick wallet in your pants? Jeez.. It's either MTX or no updates and game slowly dying. With MTX (a steady stream of money is a huge incentive to keep updating the game and add content ie PoE) and updates, a game can only grow and become better and better.
And btw, this isn't an experiment, Blizz already established it with SCII. Base game that costs money + cosmetic MTX. No problem.
Moreover, I'll say this, don't go cheap on MTX. Have $5 items, have $20 items, have $100 items. There are people who will buy a $100 hat, like this guy here. Why shouldn't he be allowed to spend money to fund development and make the game better for the ENTIRE community? Let him! Shiet, do $500 too, what the heck!!