As someone who is highly susceptible to yawn-contagion (I literally yawned writing that's and again writing this parenthetical) the <redacted-to-not-give-them-exposure> snake oil ads showing the woman yawning are a nightmare for me, but I suspect I'm in a tiny minority

They're also the only place where you get really verbose ads...so you spend all the time reading their bullshit prose before the next tube arrives.

Half the adverts are basically essays to keep people interested when they can't use their phone.