Masi isn’t a media genius, he wouldn’t have been thinking about the news, the media, a new champion, more fans, etc, etc, he probably was just thinking about what RB said to him, “one lap of racing” …he’s a racer, that would’ve almost certainly gotten through and that’s what he did. Not to gift MV the championship, but to give MORE racing and let the title be decided on the track. The trouble is, it needed more thought, he needed to consider the time required to do it properly, the effect his delay had caused to Mercedes in that they now couldn’t pit, etc, but he didn’t do any of that, it was too late…he made his decision for “one racing lap”. And Redbull got everything they wanted. A very easy win at a race where even 3 laps from the end, it looked like they’d lost the championship.
I don’t think it was planned, it was just a massive, heartfelt reaction to the situation in which he (Masi) then did everything to get “one racing lap”. Redbull won because of that extremely well phrased and delivered message.