My reasons for not posting in ISO:
I have my regulars and see new visitors every now and then.
Most times when I glance at the ISO section, the majority (not all) seem to want "the works" for the price of the McDonald's dollar menu. So most searching in ISO are not my type of clients.
Otherwise known as "Bottom-Feeders." Again, I am not referring to everyone, just ones constantly asking for Specials.
Lastly, I'm not comfortable doing some of the things that are sought after, so I don't bother.
Also, I read it for entertainment and curiosity on what is mostly searched for.
Side note on posting location: Even after I have my location posted on the very FIRST line of my profile, I am still asked where I'm located. I'm not sure if some can't view it or just don't like to take the time to read.