"And then a gentleman gave me a guinea a night to tell the story at the Empire Music 'All" (Epilogue.2)
Marvel is probably the only person who benefits from knowing the Invisible Man. He gets to keep the money the IM stole, he uses the concept for the name of his bar, and he even gets paid just to tell the story of his time with Griffin. But wait, don't forget the other person who makes money from telling the Invisible Man's story: H.G. Wells.