The people from PD probably did not follow them over into MED, either they didn't know they were moved and can't find them currently or they don't like us E Tards and refuse to post here.
Methylone probably gets more attention as it's still readily available on the streets. 6-APB and other analogues are mainly sold online and not too many ravers are ordering RCs before their next event... obviously 6-APB doesn't have a huge following compared to many other drugs.. the MXE thread in PD for example is very active because quite a few people use the drug on a regular basis. That's just no where near as common with the APBs.