I've been using Groupy for about a week, and I noticed that the "Stardock Groupy" (GroupyCtrl.exe) process is almost always at the top of the Task Manager's process tab when ordered by the CPU usage.
Now, the usage isn't anything big, it's mostly 0.1 to 0.2 % (with Ryzen 2700), but makes me think what is it doing? It the process somehow polling the windows for groups or something?
I'm not that concerned about the usage but just wanted to ask out of curiosity, because most processes are usually at 0 % CPU (at least the Fences and Start10 are).