Keep LR Presets in sync

Hi, 

whats the current best practice to keep my LR presets of LRC in sync. I can create a symbolic link with a dropbox folder and use this to keep the "User Presets" synced. But what about purchased presets that are imported and show up but cant be seen anywhere in the Finder / Library?

It seems that LR handles these differnet than the custom ones that I imported years ago. 

I cannot put these in groups… I'm confused.

I thought that the CC would keep them in sync but that does not seem to be the case. Help please 😉