X owner Elon Musk has implied that the platform throttles the reach of posts, including links to external sites, to keep users from leaving. 
Replying to a post on X by popular user Paul Graham on Sunday, Mr. Musk said if users want their links seen by other users, they should write long descriptions of what is in the link and then post the link in the replies. 

“Just write a description in the main post and put the link in the reply,” Mr. Musk …