Another Internet galaxy brain just making shit up and has no idea. The "lesbian theme" was shot in 2018-2019 when Mia was under contract with vixen. She made 8 films total and the salary would have been determined at contract signing. "Her pay grade is definitely one of the top", yeah right. You have no fucking clue what kind of money she earns since she hasn't been paid by vixen for 5 years and can only speculate what she makes from addmia. Most of her shit seems to be filmed in rural settings and cheap rooms so I bet she's not "one of the top."
Interesting thing is why vixen held on to that Alex Grey scene for so long before releasing it. Years ago discussion on ADT forum was that the scene must not be any good, so they never released it but obviously that's not true as it was pretty good. Mia was crazy popular during those 2 years her movies were dropped, so maybe she made it clear that she was quitting after the 8 scenes and vixen held it because they knew it would be big years later or maybe even to keep her relevant in order to get her back into the business. Who knows? The "pay grade" guy definitely doesn't. Lol