No one using these sites is going to care about "anonymity" enough to pay the extra costs and jump through the hoops necessary to acquire Verge and pay with it over the method they already use. First you have to acquire XVG which will either involve buying it (and incurring a fee from the service you use, provided your bank/cc even allows it) or mining it (which incurs higher energy costs since most consumer PCs aren't designed to generate large hash rates while efficiently using power). Then you might have to go through the process of converting a crypto you bought/hold into XVG, which incurs exchange fees. Then on top of all that, they're charging you more than if you'd just paid with your cc.

All this so, what, a charge doesn't appear on your statement that only you see anyway? Paying extra to put your dirty laundry on a public ledger that's copied on thousands of computers doesn't seem like great value. I realize that a lot of people's knee jerk reaction is that this "partnership" will lead to mass adoption of Verge, but there is very little evidence to suggest that anyone who already pays for porn will switch to paying with XVG and even less to suggest that anyone who doesn't normally pay will begin to.