I will assume you are referring to Internet advertising.  
I have 3 ways in which I "advertise" and Internet is less than 1/3 on my business.  
Just because you see ladies advertised for years doesn't necessarily mean it is in an effort to attract new clients.
Often, you may need to maintain an online presence for the sake of keeping your existing clientele.
The Internet base client tends to have an out of sight, out of mind mindset.