Why exactly do you feel the need to do strip tease photo shoots of different characters like this for money? It's like you're tarnishing the idea of this character. You probably don't even see why this could offend someone. You have a great costume, but if you take off the great work you did, who is the person you are actually posing as? I think you're posing as a naked chick with a red wig on, and possibly some other parts of the costume that unless you told some one you are posing as Petra, they would have no idea who you are. Asking for money to make more costumes is just praying off the weaknesses of creepy nerds who like to see these characters naked. If you want an excuse to post naked pictures of yourself for money, please stop labeling it as a character like this.
I can't speak for other members of Coslpay Deciants, but for me the fun of seeing the girls in great cosplay is half of the attraction. Yes they do eventually strip and are naked, and believe me that's great too. But I wouldn't be a member of the site if it wasn't for the great cosplay's as well.
Trust me, dude. Nobody works for Cosplay Deviants for the money. The cost of putting together the cosplay, photographer and prop/location work pretty much has to all pay for itself. I don't think they even get pensions or paid health care. Deviants work there mostly because they can and want to.