We already had a successful era of decentralization with vBulletin and PHPbb boards in the 2000s. Reddit and Facebook Pages took over that niche, and started pulling up the ladder behind them by de-emphasizing posts that linked out to a third party site. The message was clear: got something to post? Post it on the site directly, don't link. Their advertising business relies on people spending as much time as possible on [myPlatform], as opposed to [yourSite].
Heck, even that famous article about "dead Internet" has its source in a forum topic, not a viral tweet. Because it's a forum post, it's not arbitrarily limited to 280 characters, there's actually room for nuance, both in the OP and the replies to it.
https://forum.agoraroad.com/index.php?threads/dead-internet-...