[breezybottom]

Buying an ownership stake in an established business and forcing them to give you a "co-founder" title isn't "creating a business".

[WalterBright]

Tesla was quickly going bankrupt when Musk decided to buy into it. It was not an "established business". It had no plan, no car, no design, no sales. When you sell a controlling share to another person, the other person then controls the business.