Amazon is the latest of the big ad-supported streamers to lay claim to what it portrays as a growing audience — even though the numbers aren’t vetted by standard measurement services.

The digital giant said Tuesday that its Prime Video streaming service now reaches more than 315 million people around the world, compared with a figure of 200 million it disclosed in April of 2024. Amazon said the count was based on its own internal data over a period of 12 months, from September of last year through August of this year.

Amazon issues the number just days after Netflix made similar claims based on its own data, and not that of a widely accepted third-party measurement service. Netflix said it would switch to a count of “monthly active viewers,,” which it defines as “members who have watch

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