Initially I was thinking 85K/month gross. 85K gross is roughly 3500 regular subscribers averaging a few cents less than the month to month rate.
85k/month does seem way too high for net, but I would think she would have more than 3500 subscribers in any given month.
Then again, $300/yr is a lot for pixels on a screen.
The 85k/month number is probably simply made up.
I can tell you without equivocation that number is way, way, WAY too high. We run several model sites for several of our models, so we have a lot of experience with this and know exactly how much revenue those kinds of sites usually make. Keep in mind that she also has no nudity on hers, which lowers revenues even more.
Think more along the lines of 1/10th of $85,000... and if you do, you will be thinking very, very optimistically.