Of the more than 40 million dollars that Shaq would earn, Jake would earn only 4 million dollars for making that investment, compared to the billions of dollars that he would earn from his investments and the billions of dollars that he would earn from making the investments. Matthew's 4 million was not much.
Jake was really doing this just to try to help his friends as much as possible, Jake was sad that Clara and Tiffany missed the opportunity to invest with him and so they could earn much more than Shaq would.
Kobe, who was listening to the conversation between Shaq and Jake, found it hard to believe that Shaq was really willing to risk $ 10 million on a company he didn't know, he trusted Jake, but wouldn't invest that much money in a company that Jake himself said it was too risky.