Even though this appears to be directed to the pro's, which I'm not, I'll make a comment. Kaytlinjames is correct, "promiscuity" is a shaming word. Like it or not, that's what our society (most of the world, really) does to anyone who dares to stray from social norms: shame them. The usual word they use these days is "slut". Note that perceived promiscuous behavior is looked at as an STI risk. This is part of the problem in discussing this topic. People equate the two, perhaps unjustly, perhaps not. I suppose the same thing is true with cheating. I'm not sure how to handle that problem.
Back to the question. How cam work is perceived depends on the community. Within my community, which is sex-positive, somewhat poly, and usually kinky, camming is taken at face value: a way to either make money, express yourself, or just (for males) to be a wanker. If anything, it's looked at as safe form of sex, making it LESS promiscuous. FYI: I can to express myself and to please my viewers.
Vanilla people's impressions: Beats me, I'm smart enough not to talk about it to them, both for my sake and theirs. My guess is that they would regard it as less promiscuous than the things I do in real life. I suppose someone who leads a conventional life outside of their camming work would be regarded differently.
And that leaves my audience. What does the Avenue Q porn song say: "Grab your dick and double click." Don't expect too much accurate analysis from them. They're all thinking with there little heads. They see what they want to see. Dress as a librarian, and most will think "Oh my God, a slutty librarian". Whenever I break the forth wall and talk openly to a viewer in private, they almost always accept my real-life living situation readily.
It seems to me that it's up to the cam performer to portray the personality that they want to: Promiscuous or not. Convincing them that you're not promiscuous in real life when you're on a porn site is an uphill battle. If you portray a slut, that's what people will assume until they get other info. In any case, I think that it's actually pretty easy to correct the false impressions that people get from camming given an opportunity to talk with any reasonably open minded person. Forget the closed minded people, they'll think what they want to think no matter what.
Bonnie Blue - had to look that up on the internet. Well, I'd talk that talk to my audience and they would love it. That's my typical for my viewers. I wouldn't walk that walk though. I think that's a stunt, and not promiscuous unless she really liked to do that in my opinion.
Numberst? Numbers?? You mean THOSE numbers? I may be misunderstanding here but: Yes, I talk about them if they ask. Are you asking?
