I'm a romeo plus member (have been for 15years or more) and use their "uncut" app, so I have no restrictions whatsoever. In Bangkok and Pattaya romeo shows quite a few members online, outside BKK/Pattaya not so much, depending of course on your filters.
blued I believe to have users everywhere in Thailand.
grindr, hornet and jack'd were frequented as well.
As I said in a different thread, I've been in Thailand for two weeks now, but spent most the time in and around Nakhon Ratchasima. I've had dozens of boys contact me on blued, hornet, jack'd and grindr (in that order).