Hope_Fowl - 8:39 pm on Jun 14, 2010 (gmt 0)
wyweb: By "opinion sites" I was referring to the sites where people report the phone number, caller ID text, and info about who they spoke to. I think you're referring to something more like a "review site", and the Caller ID sites are basically a specialized review site. I think they're simply making money from ads.
The other kind of site is one which at least starts from a directory which they load in from an external source, and then they provide access to it in various ways. Obviously this can be combined with other services, and many providers have done this, particularly with social sites and person-search sites.