I don’t see b2b as value for money from what I’ve experienced. As others have said, some ‘b2b’ offers consists of boobs out/naked and usual HE. I did visit a SP who I knew did b2b with a thong, but I knew that and she did provide good b2b, however some just class it as taking their top off for the last 10 minutes or so or provide b2b for a matter of minutes/seconds. I rarely go for b2b due to this if offered towards the end of the session and will only have it if they’re naked from the start.