what is the gain of using a 3rd party site to read here? 
More features, easier to use etc.
Here is topic about bitcointa.lk which was one of such sites, now it's defunct: Bitcointa.lk, the Bitcointalk community with a 2014 forum software.
I'm not sure if you know, but this forum was going to be upgraded, there were some funds collected for this idea but it never happened for some reason.