Player participation rates are way down since v3 came to be.
Only one club I know has been able to sustain and slightly grow in the wake of the switch to v3. The other 5 have all seen player dissipation---lack of participation in matches, lack of new players coming in to the groups/clubs.
At least in v2, players coming to chess.com had a prayer to find a path in to joining appropriate groups. Now, with "clubs" burried deep in the menu path, there's next to no chance.
You killed the social aspect of chess.com. Once you cut the umbilical chord, there's no need for the kids to come back.
I would love to hear any concrete examples of how Clubs or USChessLeague are at all different.