It's the difference in difficulty for the criteria.
https://www.pathlawgroup.com/o1b-visa-requirements/
For all other candidates, at least three of the following criteria must be met in order to qualify for the O1B visa:
Having been or will be performing a lead or starring role in productions or events which have a distinguished national or international reputation (as evidenced by critical reviews, advertisements, press releases, publications contracts, or endorsements)
Critical reviews or other published material in professional or major trade publications or in the major media by or about the applicant which show that the applicant has achieved national or international recognition or achievements
Evidence of performance in a lead, starring or critical role for organizations or establishments with distinguished reputations
Evidence of a record of major commercial or critically acclaimed successes in the performing arts, as shown by box office receipts or record, cassette, compact disk, or video sales
Evidence of significant recognition for achievements from organizations, government agencies, or other recognized experts in the field
Evidence of having commanded a high salary or other significantly high remuneration for services in relation to others
Other comparable evidence (This category is not available for those in the motion picture industry)
For traditional arts, you've gotta be
good.
For an influencer... some number of anonymous followers?
There are certainly some that would qualify... but it they should be held to the same standards as others.