LinkedIn in some cases imposes penalties for outbound links [0].
Consider that LinkedIn has been trying to establish(/convert) itself in part as a blogging platform, and keeps trying to show you other users' blog posts, unsolicited. But not links to Twitter/X, Substack, Rumble, external blogs etc etc. Even though many LI users' blog-type posts are low-grade, it's near-impossible to get them successfully flagged as spam or self-promotional. Every time LI serve you a link to some other content on-site, and suppress serving you an outbound link (even if it was higher-quality), it presumably increases engagement on LI.
Consider that LinkedIn has been trying to establish(/convert) itself in part as a blogging platform, and keeps trying to show you other users' blog posts, unsolicited. But not links to Twitter/X, Substack, Rumble, external blogs etc etc. Even though many LI users' blog-type posts are low-grade, it's near-impossible to get them successfully flagged as spam or self-promotional. Every time LI serve you a link to some other content on-site, and suppress serving you an outbound link (even if it was higher-quality), it presumably increases engagement on LI.
[0]: https://www.linkedin.com/advice/0/how-do-you-avoid-recover-f...