Musk vowed to act, despite a previous attempt triggering a swarm of trolls and imposters.
Opening the blue tick to paying subscribers - in a programme called Twitter Blue, was among the decisions made by Musk when he took ownership of Twitter last year, but his overhaul backfired terribly. Since taking control, Musk has sharply cut the group's ranks of employees and the site has seen a string of technical breakdowns.
If a celebrity or brand does not pay for a blue Twitter checkmark, an imposter might buy the illusion of authenticity, the analyst said. As matters currently stand, blue checks of celebrities, including Justin Bieber and his 113 million followers or footballer Cristiano Ronaldo and his 108 million, are tagged on the site as "legacy" accounts.
The Washington Post said it would be reviewing the changes while AFP, in an internal email to staff, said it "will adapt as necessary."