It's a bit of self referencial humor. Like 15 years ago zuck did a live stream or something. On that Livestream he kept awkwardly talking about how much he loves sweet baby Ray's bbq sauce.
I think he did that because knows how detached he comes off as. He was a weirdo before he became a billionaire, and being a part of a separated class of society only made that worse. He also knows how everyone on earth thinks that he's a distrustful person. Plus he's just clearly not comfortable being on camera.
It was basically a failed attempt to come off as relatable and down to earth by sharing something that he has a passion for. Which apparently is grilling. I get it, I like grilling too. But I won't ever be tasked with trying to use that one interest I have as my entire public personality.
He tried something like that before. The reason he wears plain looking tshirts and pants is because it makes him come off as "like one of us" and that he remembers that he came from nothing like the rest of us. But then a few years ago it came out that the black Tshirts he wears costs like $400 each and so does the rest of his outfit.
Do you think it might now be an in joke for all his adoring fans, lol. He doesn't seem like the type to have a plan to do this, so is it his marketing Dept trying to make him seem funny and relatable? The level of stage management seems preposterous for such a bad joke prop. Do they struggle that much to make him relatable or is Facebook just really bad at or and marketing as they don't need to be due to network effect driving their growth rather than product or traditional marketing.
I think it's a little of both. I can't imagine being so widely mocked to the point that people don't even think you're a real human being anymore feels good. Even if you're a multi billionaire. But a lot of it is probably just marketing. There's no way zuck had anything to do with the props on that scene. That was probably some uncredited cameraman's idea.
Facebook is so detached from what people want. They don't know how to make products that people want, and they don't know how to market them in a way to make us buy them anyways. Remember that weird video call thing they tried to sell a while ago that no one bought? They're still trying to sell that.