When out hunting, a hunter will select the forest with the highest number of desired prey. Admirers are going to frequent chat rooms or bars with the highest number of t-girls. It is simply a matter of numbers and statistics. I'm frequently out in a wide variety of mainstream places and have been overtly hit on only one time by a guy who read me. The occasional times I'm at one of the main t-girl hang out in town, the male admirers are there and I get hit on depending on the situation. They seem to fall into the two groups of aggressive/persistent or reasonably well mannered with most being in the former group. Then there are the ones that stay in the distance and just watch. I call them the orbiters. There are also the t-girls who have overtly or hinted at wanting more than just friendship. If I based my assessment on the t-girl and gay bars and places like CraigsList and chat rooms, yes, there seems to be a lot of admirers out there with many interested in one thing and wanting it now. If I look at the rest of my world, no, there are not a lot of admirers out there.
To echo what others have said, in my experience most of the male admirers are looking only for sex. Many only want discreet encounters and do not want to date in any form. Once they find out I don't dive right into getting physical (not that there is anything majorly wrong with that between consulting adults, it is just not the way I fly) and require getting to know each other by going out on a few public dates, 90%+ lose interest right away. Then there are the few that want to jump right into a LTR relationship, but they tend to be on-line and not in person.
From my experience and observations, it comes down to a simple thought......if you swim in waters with ample bait, there will be sharks of various types.