While many people were turning to Twitter on Sunday to watch the World Cup finals unfold, the company introduced a new policy banning "free promotion" of competing social media websites. Moving forward, Twitter says it will remove links to Facebook, Instagram, Mastodon, Tribel, Post, Nostr and Donald Trump's Truth Social from accounts whose "main purpose" is to promote content on those platforms. As a result of the policy, users can no longer use their Twitter bio to link to their other...