Reminds me of a Game Grumps Let's Play they did for Dead Space 3 which was clearly, blatantly paid content. Not only was it a modern game in a show that mostly played older games (the occasional sonic sequel aside), but every few minutes they would radio-dramatize a bird flying in with a note on its leg, which turned out to be the next batch of copy points provided that they had to read if they wanted to get paid. I don't think there was actually any disclosure, but they couldn't have been more obvious about it having been paid content short of coming out and literally saying "they paid us to do this."