It's probably relative. Some years back, a provider who had a presence on the internet/in newsgroups might well still have been under the radar - in a sense. But the internet has become another "utility", another branch of the media. Now she'd have to stay off the internet to be off the radar, I think. Or,maybe, be on the internet (in a forum or two), but discreetly, and certainly w/out her own web site. (For that reason I worry a bit, sometimes, about my own favorite, Julie of NYC: is she too high profile??)
Regarding the serial in Salon.com: was a very good series, until near the end, when she decided to marry the prince and the series abruptly ended. Hey, I thought nobody, leastways not women, believed in those happyendings anymore. (For you guys who havent read it, by "the prince" I mean the unbelievably obtuse guy who seemed never to figure her out and who proposed, especially since, in the series, the guy's sister seemed to have figured her out). The premise was a Canadian-Chinesewoman who started in her career in her teens and moved on to NYC. But there were interesting insights into the workiing girl's condition - including to kiss, or not to kiss, and to orgasm, or not to orgasm. (At the end there wasome drama - an IRS-investigator was stalking her, for supposed investigative reasons, and then got busted himself). I downloaded a lot of the stories onto a different computer, and will upload the urls is anybody cares.
Somewhere else I saw a piece, also on the web, discussing how the web had changed the econommics of sexual work. Was contended that the ability of providers to advertise on and make arrangements over the internet had eliminated the middlemen (middlepersons? pimps? madames?), and had also led to higher prices (since there were fewer risks for the providers - but that might not actually be true, I suppose, if LE hangs out on the various boards and decides to be a pain in the ass and take its job seriously).