I've raised a decent bit from a well-known pseudonymous twitter account. If it's a smart contract-based investment, the blockchain secures their investment, not law, so don't need their "real" name for that.
Short of needing the name for legal reasons, why do I care what their birth name is? I know they have a certain audience in my target customer base, I know they are knowledgable about my space because I hear them talk all the time in twitter spaces.
If they want to remain pseudonymous, let them! In a world where gaining a large online presence essentially rolls the dice on whether you get cancelled for something in the future, are we really surprised people want to reclaim a bit of anonymity on the internet while still being able to build a reputation they can build on?