I've noticed some streaming platforms have ads for other shows/movies they've made. I don't love these but can tolerate them because:

1. They are only at the start of a show, so I'm not interrupted. 2. They offer a skip button. 3. They are ads for somewhat-relevant content and I don't tend to explore the space of other things to watch very much.

That said, it's a knife-edge for me. If they got even a smidgeon worse I probably wouldn't watch anything on those platforms.