All of those supplements are made with “magtein (r)” branded magnesium l-threonate. It all goes back to the same company and that company is the one that has supplied the “studies” that prove its effectiveness. And by “supplied” I mean that the literal vice president of the company’s research arm was an author on at least one of their studies but didn’t disclose his connections until a follow-up update to the study.

I'm not taking either side but people don't need to directly link to their own store to benefit from increased awareness and "hype" in some product category - a rising tide lifts all boats.

"Health" and more specifically the supplement industry is just a revolving door of fads. There's also survivorship bias, those who are obvious get banned quickly.