Surely this must at the very least be illegal advertising or something like that. He literally owns one the largest ad platform in the world and sells ads to other people. He then uses his ownership to put an ad for a currency he has stakes in. He doesn’t just put this ad somewhere where other ads goes, but in a very prominent location, visible to all users, even those with ad-blockers, other customers don’t have the option of buying an ad placement like this.