Don't think either of them were actually huge sellers (chartwise they didn't do great - the Hardin's did not chart at all, though maybe as back catalog they had better shelf life. And I'm sure Hardin sold a tad better than, say, Gil Melle or Alan Shorter). The Zappa's did sell, and they had some sizeable one-shot wonder success with the Hombres, Friend and Lover, and Janis Ian (who also was later much more successful at Columbia, though her early Verve stuff is much more interesting). They missed out letting Laura Nyro and Rare Earth get away after their first albums, but didn't know how to produce either of them as well as Columbia and Motown, The Verve Folkways/Forecast labels impact goes well beyond their sales. The Blues Project, Richie Havens, Tim Harden, Paupers albums should have sold more than they did. The Paupers had a chance to be big, but stiffed at Monterey.