This game concept is absolutely insane. Crazy to think that a game like that wouldn't even have been physically possible 10 years ago.
(Tommy fried my brain)
Have you considered contacting creators to receive exclusive content? You could send them a script (maybe even a few lines, although beware if their acting sucks) and receive 5-10 minutes of otherwise unpublished material. This might also allow you to use longer video clips without fear of copyright infringement. As a tradeoff, the creators would receive the most effective advertisement possible at the end of each chat. (Maybe you could add a final [video] message from the creator, not just the link). On Twitter, OF ads get little engagement, but here one could advertise one's channel to people who have just spent hours chasing one's nudes. Couldn't think of a better audience. It's like placing a KFC billboard at the end of a marathon track.
Also, small creators who are less recognizable and therefore make the experience more realistic, might also be more open to such a collaboration.
That being said, the premise of the game works so well. When nudity is present everywhere, things become unsexy - but if you have to work for it, the reward becomes what it once used to be.
Best of luck!
EDIT: Created an account just for this comment.
PS: A lot of people seem to want to turn this into a weirdly cringy dating simulator, hope you stick with your original vision of having the catphishing be the central element. Plus, the game design already looks really good, I hope you take people's feedback somewhat conservatively and don't try to please everyone. You're already on a really really good way.