The question "Would he even remember if he had?" pretty much HAS to be asked.
As for me,I have no doubt he focuses on money like a hawk on a rabbit,and money and family are the only things he is really aware of.
Even then,I seriously doubt he remembers more than what his cut was,not what the pay-off was for.
AFATG,I doubt he would even care if he DID know. With the Biden's,it all about "Me,me,ME,DAMMIT!"