I guess the problem is that her instagram is kind of out of control... As a potential employer you'd never know whats happening next... On the other hand, these days everything seems to be about social media fame, regardless of its content, so maybe she can even get some advantage out of it? I don' think she can seriously harm someone's career since it's kind of hard to take her too seriously (I'M sorry...).
But I personally - as someone who is not into social media fame and does not fully understand it - would find that account problematic. On the one hand she's idealising her (old) self like no other, which I find pretty sad. On the other hand - and that's the out of control aspect - she seems to feel genuinely offended and treated badly by the industry and does not hesitate to make those feelings public. I mean, we don't know what has really happened, and of course models don't have to take everything without complaining, but she either complains without giving any facts, which kind of disgraces everyone who has ever worked with her. Or she feels offended but does not care at all if she is also offending other people in return, like the vogue ukraine nudity thing. Or she brings in personal stuff that should remain private, like whatever she had with Natasha, I don't remember actually what it was about. I believe noone can be sure that she'll be fine and won't complain about whatever she feels offended by, during a job.
Moreover I also doubt that there is much demand for her at the moment, at least not for a "Snejana superstar" comeback. But I personally would not mind if got work again, I really liked her as a model, that VI cover is pretty much my all time favourite.