Jason Rasgon noted a phenomenon where one is asked to collaborate on a grant proposal but is jettisoned after funding of the award:
Ive gotten this where it turned out I was a trophy collaborator to get the grant but, once the $$ was received, I was cut completely out of the project
— Jason Rasgon (@vectorgen) July 3, 2018
I'm sure there are cases where both parties amicably terminate the collaboration but the interesting case is where the PI or PD sheds another investigator without their assent.
Is this common? I can't remember hearing many cases of this. It has happened to me in a fairly minor way once but then again I have not done a whole lot of subs on other people's grants.