Not sure if this a helpful report but.
Was in Jakarta last week and stayed at the Shang. From my prior trips I have never been that impressed with BATS, so decided to try my luck with wechat. I was lucky on a prior trip where a guy sent me a girl who had an amazing command of English (yep was an English teacher), but silly me forgot to bring her number. So fired up wechat and within minutes had 10-20 hellos from people asking whether I wanted a massage. I usually say that I'm looking to hang out with someone, then they respond with massage plus sex for 800. For those who don't like classic or travel, while the girl neve looks like the picture sent, you do get a full 2 hours for 800 so it's not that bad of a deal if you get a good draw. So in my case I tried two places (usually a papa is chatting with you) and I had one chubby girl who was wild and BBBJ the moment she entered my room and one shy who needed to warm up but then did whatever I asked. Again, the benefit of the brothels is that you see what you get, but service is completely unknown. I've found the outcall massage scene to be much better service but the girl isn't that pretty. Most places I have found who say no ++ do provide it, you just have to make them go for the first move. Since I booked one for LT for the hell of it, asked about the system. In her case, papa calls up some girls he knows once he gets a ping. The interesting thing is that it's like a network, my girl in her free time (while I was recovering), would get some more pings, she responds as if she will go but then calling a friend to give the 'massage'. She had a album full of normal to cute looking girls that she uses to get the booking, but of course none of the girls actually exists in the stable or group of friends. So we chatted about the business and how much of the cut she gets, etc. All very interesting for a mere 1. 5 for a full night too. The shy one I have her direct contact so will likely go for again when I am back, but I find this scene is much better in terms of value for money vs the brothels. Ymmv.