Lately my girlfriend only wants sex for content

I (25M) have been with my girlfriend (23F) for four years. We have a great relationship - she’s open, honest, funny, and we just generally have a lot of fun with eachother. We have always had a pretty healthy sex life, and she initiates about as often as I do.

A few years ago, she started making NSFW content, something she ran by me before she started. I was on board. As long as she set professional boundaries with her subscribers, whatever. It even seemed fun. I started being involved in more of her content, and at first, I really liked sharing this secret between the two of us.

Recently, however, I’ve found that my girlfriend would initiate sex daily and would almost always ask me to film us partway through. I feel like she only wants to have sex with me for content. On the one hand, I like being involved and think it’s hot recording our moments. On the other hand, though, sometimes I can’t help but feel used for content.

Am I wrong for feeling like this? How should I bring this up without seeming like I’m complaining?