Just like tobacco companies operate in the "technically legal" sphere, the Facebooks, Reddits and X's of the world precalculate the amount of possible fines, and just run more ads to compensate for the losses. Simple bans don't work anymore thanks to distributed residential proxy botnets spoofing geolocation anywhere in the world and AI assisted ID generators.
We have to deal with the fact that a significant part of of society have addiction disorders and no matter what the substance, someone will get addicted to it. Even Slashdot provides addictive features like mod points and troll comments. It's unfortunately part of the human experience to want easy pleasure.