• Elon Musk's social media site X began rolling out free premium features, including verification badges known as "blue checks," to select users late Wednesday.
• Musk said every account on the platform with more than 2,500 verified subscriber followers would get Premium features for free, while accounts with more than 5,000 would get Premium+ for free.
• Many users were notified that they had been given complimentary subscriptions as "an influential member of the community on X."

Elon Musk's social media site X began rolling out free premium features, including verification badges known as "blue checks," to select users late Wednesday in an effort to reward what it calls "influential" people on the platform.

For most users, X Premium is a paid subscription service that can be opted into. According to the X Help Center, subscriptions fall into these three tiers: Basic, Premium and Premium+. By subscribing, users get access to exclusive features, like the ability to display a blue checkmark on their profile. The Basic web offering starts at $32 a year in the U.S., while Premium+ costs $168 annually.

Last week, Musk in a post on X said that every account on the platform with more than 2,500 verified subscriber followers would get Premium features for free, while accounts with more than 5,000 would get Premium+ for free.

Many users on Wednesday, including some CNBC reporters, were notified that they had been given complimentary subscriptions as "an influential member of the community on X." The company said it reserves the right to cancel the subscription "in its sole discretion."

Musk introduced subscriptions to X to supplement the platform's advertising revenue. Many advertisers have taken a step back from the platform or have quit buying ads entirely, following Musk's controversial Twitter takeover in late 2022. In November 2023, for instance, companies like Disney and Apple paused online advertising campaigns on X after Musk endorsed a conspiracy theory.

It is unclear how long users will have access to free premium features or whether it will be possible for them to opt out of the service.

X responded to CNBC's request for comment with an automated message.