One more before moving on:
this Wiki list is what we've been using and will continue to do so.
Ah, I see.
Accumulating members is kind of The Waterboys' shtick. If THEY say all those passing-through players are members, who am I to argue?
On a related note, The Foo Fighters should adopt that scheme. They could claim Justin Timberlake, David Lee Roth, Alice Cooper, Slash, Lemmy, Paul Stanley, Zakk Wylde, Jack Black, Norah Jones, Rick Nielsen, Billy Idol, John Paul Jones, Bob Mould, Paul McCartney, Brian May, Joe Walsh, Fred Schneider ... and
Rick Astley.