Groves gives his sponsors value fore money doesn't he? 166lbs even with those huge headphones around his neck. Duffer kit on everywhere he goes. Daily updates on his food from David Hayes sisters business etc
Well to answer your question, yes he does give his sponsors value for money, like most famous faces who are sponsored by large companies. Brand awareness, innit bruv.
I don't think he' sponsored by Beats who, incidientally, have just been bought out by Apple. Groves, sponsored by Apple Inc.? I doubt they'll complain about the product placement thought.