So Country Girls is the side income for H!P now, right? Releasing singles digitally because fans will buy them. If they did some physical release it would show that it wouldn't sell well, and they can't do handshake events to push sales because 2/4 members are busy with their new groups. That being said, 4 members aren't enough to push handshake events, especially since I fear that Ozeko is pretty far down on H!P's popularity charts.
I doubt whatever numbers they push digitally is actually any sort of real income. Probably just to remind people they exist so they can still sell their goods at concerts.