I remember seeing a video where they said the SDI was borderline a scam. A bunch of pdf books that cited Wikipedia articles, half of which contradicted eachother and the industry never took them seriously. But after that (what looked to me as a bombshell revelation) I saw basically no ripple effect on the Guntube ecosystem, and SDI still advertises prominently in the major channels. So was it not true? Or is everyone I watch corrupt? What is it?