Twitter is nothing like that. It's a publicly-traded company with thousands of employees, covered in ads, and Jack Dorsey owns something like 2%.
Twitter is like a BDFL hobby project. I obviously don't mean that literally and am aware it's a publicly traded corporation. Twitter is a hobby project in the way that Oculus is a hobby project of Zuckerberg, even though Zuckerberg is the biggest shareholder of Facebook. It's a matter of where the leader made his money--Zuckerberg made his money from selling ads on FB (not VR), Jack made his money from selling a financial product (not social media).