Jack Dorsey isn't attempting to sell anything here. The site allows anybody to make an offer, unsolicited, on a tweet of their choosing. Jack can choose to accept the offer if he wishes, but he's not the one who initiated this.
I've been playing around with a Nest Hub Max, and with that you can pause/play a video by holding your hand like a stop sign in front of it. Kind of gimmicky, but occasionally useful.
Was also curious about your use cases on the phone (aside from ad skip), and they actually worked for me. I'm using a pixel 4, though wouldn't think that'd make a difference.