Twitter shut down the Magic Recs bot, which was alerting them users via messages about trending positions and popular accounts.
His representative Twitter he said for the new direction of the company with regard to the bots that @MagicRecs will no longer send recommendations via messages. Recommendations will now be delivered via push notification.
Bot Magic Recs (which Twitter has always considered an "experiment") was one of the few useful bots with around 112.000 followers.
If you followed it it would send you direct messages for trending positions and popular accounts.