Remember ... Elon bought Twitter last month for $44 billion ... with the help of wealthy investors and loans from Wall Street banks. Some of those investors reportedly include Saudi Arabian Prince Alwaleed bin Talal and Twitter co-founder Jack Dorsey.
As for Diddy's 8-figure investment, we're told his strategy always revolves around having a seat at the table to represent.
Our sources say Diddy and the rest of Elon's Twitter investors believe in Elon's vision for the bird app. As for what that vision is ... our sources are mum.
Diddy and Elon have been rubbing elbows a lot this year ... they both sat in the front row of Dave Chappelle's show back in May at the Hollywood Bowl ... the show where an attacker ran on stage and assaulted Dave.
And in other Diddy business news -- according to The WSJ -- he's supposed to buy cannabis operations in NY and two other states for up to $185 million ... a move that we're told will create the largest black owned company in the world.
Diddy's 53rd birthday is today ... so it'll be interesting to see if Elon wishes him a happy birthday.