New wave prostitution?

J • Everything in due time .. <3
So a girl in my town is a nude model. I'm cool with that (not that she needs anyone's approval). She's a beautiful girl and has a great body. Her modeling pictures are shot by actual photographers, some completely nude, others clothed, pretty awesome quality images all in all. But here's where I'm a little thrown off and would like to know what some other women think. I don't think it's right that she posts pictures of herself in her panties or topless on her tumblr account with captions saying 'if you buy me something from my Amazon wish-list, you'll get explicit photos meant for your eyes only. The more you spend the dirtier I get ;)' lol Isn't that pretty close to prostitution? 😯