X's handle marketplace will sell some 'rare' usernames for millions of dollars

X is finally following through on its long-rumored plans to sell old user handles, and some of the most sought-after usernames could fetch millions of dollars. The company shared more details about and opened a waitlist for its "handle marketplace," that will enable paying subscribers to request and buy "inactive" handles. According to the company, X will make two types of "inactive' handles available: "priority" usernames that may include "full names, multi-w...