Some Twitter users say the option to sign up for $8 Twitter Blue has disappeared from its iOS app; an error message says it will be available "in the future" (James Vincent/The Verge)

James Vincent / The Verge:
Some Twitter users say the option to sign up for $8 Twitter Blue has disappeared from its iOS app; an error message says it will be available “in the future”  —  Twitter users are reporting that the option to sign up for the company's new $7.99 subscription service, Twitter Blue …