Maybe she is, but knowing her fairly well I doubt it. If she is doing extras I'm not sure who she's offering them to; she was a 3-4 times a month regular for me from March last year until about August or September (dropped down to about 1 a month after that), and she never offered me.
I understand your perspective on her body (though I think many would disagree), though you probably missed her when she was at her most fit, about middle third of last year (if you thought she could do with some toning up near the beginning of last year when she started, probably don't go and see her today). Personally I think she's gorgeous and her service is great, but objectively there are girls who surpass her on either or both.
Scarcity and intrigue are the key; I don't think there was ever a time when she was working more than 3 x 5-6 hour shifts a week, mostly it was 1-2 shifts a week (dropped down to like 2 shifts every 3 weeks or so now). I think she picked up a fair few regulars early on - I'm far from the demographic of her typical regulars, and I'd say most of them are not regular contributors to this forum - and the regulars tend to get precedent in booking. This has created this sort of mystery around her, because the majority of people who want to try her don't even know what she looks like, let alone have met her. Scarcity + intrigue = demand.