There's nothing more fun than DB's looking around with their hands in the air as if "how did that happen, wasn't someone supposed to help me, what the hell!"
This is a tough fantasy call. Allen has become one of the better throwing QBs in the league but Murray running is still extremely integral to the Cardinals offense and gives him a high weekly floor.
Brady is a bad example because he had all sorts of shady side-income deals with Kraft to get around the cap because of course they're gonna cheat.
Edit: Before this gets flagged as fake news https://www.cbssports.com/nfl/news/report-patriots-pay-a-brady-owned-company-run-by-suspect-partner/