If there's something I'm sure about Justin Sun, is that this dude loves attention. And by having a dinner with such a big name in the investing space like Warren Buffet, this dude's definitely gonna get some publicity in social media and in media in general. I mean, he already has an article from CNBC[1] lmao. I completely agree that this money could be used for a lot more better things though; knowing that Warren Buffet isn't really tech literate.
[1] https://www.cnbc.com/2020/02/06/crypto-entrepreneur-finally-gets-4point5-million-meal-with-warren-buffett.html