More importantly, if they go over the number of authorized shares (2 billion), there has to be a shareholder vote to do so. Below that, a split only requires Board of Directors approval.My understanding is that the company is authorized a certain number of shares and cannot issue more than that without first filing with the SEC. The speculation then was that 10:1 either breached the allowed share count or would have gotten too close to it (e.g., interfere with a cap raise, Elon's benefits, whatever).
I've been meaning to look into that, but haven't quite gotten around to it yet. So