I agree, to a point . They'd sell a lot more of subs and paid content if they continued making vids together.
You can tell they were never into it, the last vids I remember from them are the one where they did REAL oral (and some mutual masturbation maybe?) and another where they pretended fucking with a strapon (you could really tell there was no penetration) and everybody here was outraged because it was not real.
Maybe there were boundaries they (or one of them) didn't want to cross, and they couldn't step back to just teasing like their first vids. That's just my guess