Not asking for names but was wondering if some of these folks just jumped between teams or if they were permanent members. A bad apple could cause issues simply by joining good teams for short periods.

If all you are worried about are credits, then this sucks for you, but oh well, life moves on, and so will the project, the project was doing just fine with its efforts before the GPU people came and overtook everyone in the rankings (Note that even with my laptop crunching full time, even with its GPU crunching, my ranking only went down).