Lol.
I guess. There IS merit to what you say. I will offer this two cents worth.
You know what kind of girls you like. The easy answer is to simply seek out the type of ladies you like. I.e. if I want a big booty blonde, I'm going to search the showcases of local big booty blondes. What I'm NOT going to do is put out a flyer, hoping that a big booty blonde sees it and takes bait.
ISO's, on the surface, are basically I'm 'looking' for this, but if you're....reasonably in the ball park of what I MIGHT be looking for, I will consider settling if what I'm looking for doesn't magically fall in my lap.
In this day and age of rapid searches, that have reasonable narrow down processes, ISO's seem obsolete.
I realize this post may not get any likes. I just feel that ISO's are...why ask a question that you already know the answer to??
As far as the ladies responding to them go, hey, they're online, logged in. Maybe business is a little slow for them. They're just being proactive. What's wrong with trying to garner up some business for yourself?