I used to get both a lot of girls from sites like TF as well others, as well would go to the bars. Both online and in bars, it has been a declining trend since over 5 years. Sure there are plenty to find online and offline but price inflation is as much, as well is obese.
I do not buy into this theory that they all switched to online, I believe many simply stopped doing it entirely, at least to farangs. Also many now work for the Chinese since X years, and those guys pay 5K short time easy. The prettier ones are usually to be found there, same as in local Thai places.