Why do you seem surprised by this "business model" ?? It's been going on for years because it works for them... Because we are a very generous nation
Firstly like I've always maintained, and it's good you keep reminding yourselves, virtually ALL MLs who offer bbbj ARE or WERE FLs!
So they can easily toggle from massage to full services on different stables. Whichever is more lucrative. In fact doing massage and having customers top up for fucks (because you are special

) yields more profits than advertising for fj alone.
Secondly, their prices and services vary from stable to stable - Depending on the demographics of the punters who log on to those stables. Like LTD are mostly visited by carrot heads, so always only hj. But the same girl can be seen advertising bbbj and/or 2x, even fj on other lesser known stables for exactly the same price!
So always do your homework and cross reference. When some girl catches my eye, I will look out for that girl in the other stables like slg, Ltd, woolfes, etc, etc. If her price and service are the same, then I'll shortlist her. But if prices and services varies, means she's all out to con and the session is guaranteed to be shit.
Do your homework. None of these girls are so special. When you top up you have just been suckered into their smart marketing.