Seems to just take up the slack of the rod moving on the pin. I wouldn't expect it to impede the rotation of the Wastegate arm.
These clips are an official Audi fix under TIS. Yet to find anything similar from BMW though...
Car: 2010 Jaguar XFR (Stock - For now)
Gone but not forgotten: Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)