PG has experience in this space, remember. He played a role in helping detect and prevent spam back in the day.
https://www.infoworld.com/article/2674702/techology-business...
https://www.infoworld.com/article/2674702/techology-business...
I cynically wonder how much credibility we give this tweet is due to the author having 1) a huge following and 2) lots and lots of money. And of course 3) it being posted on the forum for the company they founded.