Renderosity has frequently stated that it wanted to be a "family friendly" site. That is no secret. Many have argued that it truly cannot be considered "family friendly" if it carries adult-themed products in its store. At least, now, the same rules apply across the board. This does have to do with their desire to be a family friendly site. It also has to do with Paypal/Visa's restrictions, which ARE part of an even larger picture. We really can't say there is only ONE reason this is happening.