I figure there is a very simple reason such stuff gets advertised in the Stage - and it's called 'garnering advertising revenue'. Which is what a vast amount of papers (even on - line) have to generate in order to cover their own costs of production. Given that, in this day and age, there are a)many organs other than the stage through which an individual can advertise jobs in the industry and that b) many of the most high ranking CD's would not touch advertising in the Stage (or even PCR) with a bargepole, because they know it is tantamount to asking everybody and his Uncle Pete to clog up their inboxes/letter boxes for the next six months solid, - the Stage has to take the adverts where it can get 'em. And so, it takes revenue from pole dancing clubes etc. who are always looking for a high turnover of performers, I suspect. In this sense, it is no different to me than the (equally aggravating) tendency of The Stage to advertise performing in animal suits as theme parks as 'acting', when in fact it is an exploitative job which anyone, trained or otherwise, could get away with. I agree with Forbes that not everyone could be a pole dancer, in contrast, but then, I would also argue that your need for 'qualifications' would depend on what sort of level you were being asked to perform at.
In short, though, The Stage is filled with this kind of stuff, because pole dancing clubs, theme parks, cruise ships etc. are the only people who are regularly prepared to pay them money for advertising. This makes something of a mockery of the idea that The Stage is the first port of call for any actor seeking work - it advertises straight acting work (and that will generally be fringe stuff) once in a blue moon. Perhaps it was true that the Stage was an actors bible 40 years ago, but no longer, I'm afraid - anymore than we are living in the days when only Equity performers get to appear in paying shows, or when being in Spotlight actually meant something.
And that possibly doesn't have much to do with the original point of this thread, but so what?