https://arstechnica.com/tech-policy/2023/03/twitter-to-un-verify-people-who-dont-pay-8-month-starting-on-april-fools-day/

Four and a half months after the chaotic rollout of paid checkmarks, Elon Musk's Twitter is following through on a plan to remove verification from individual accounts that don't pay $8 per month for a Twitter Blue subscription.

"Starting April 1, we'll be winding down our legacy Verification program and accounts that were verified under the previous criteria (active, notable, and authentic) will not retain a blue checkmark unless they are subscribed to Twitter Blue," a Twitter FAQ says. Twitter also stopped accepting applications for verification checkmarks under the old criteria.