from SUPEROLDIES.com:
http://www.superoldies.com/insider11-03.html
"The proliferation of fake oldies groups has caused immense concern among the "real" artists, who have been stripped of their identities and livelihood by unscrupulous artists, promoters, and managers...The most obvious is the unbelievable amount of Coasters, Platters, and Drifters we have at many of the oldies’ shows and casinos. Even the largest Vegas casinos are charging $50 a ticket to see these three coupled up together, and the results are saddening. One report from a backup musician states that The Coasters simply put on wigs and switched suits between shows and then came out as The Drifters.
"Frankie Ford ("Sea Cruise") got a shock when traveling through the Carolinas and saw The Platters on the venue marquee and thought he’d stop in and see some of the guys. 'One of them was white . . . a white dude in The Platters!" he exclaimed, as only Frankie can.'
Quite a lot of the "group" names are owned by someone other than any of the original performers. Each time the "group" goes on tour, it may be made up of entirely new performers.