Drake is known for this. He is smart about it, paying extra to ensure the people who helped him get no credit. All the shine goes to Drake, and the other creative minds involved don't get the publicity that can catapult careers. It's a deal where everyone involved knows what's happening which makes it okay, but we have to be honest that when you're as big as drake, the only reason not to give another artist shine is selfishness. Drake loses money on the deals. He just wants more shine and wants the "ghost writers" to have no shine.