Alphabet Inc.’s Google, Facebook parent Meta Platforms Inc., and Twitter, as well as other very large social media giants, face strict new content rules in the European Union which will impose all sorts of strictures on the online platforms, including publishing detailed data on their numbers of active users.

Under the new Digital Services Act (DSA), platforms with more than 45 million users will be labeled as “very large” online platforms, which will subject them to additional obligations, including external and independent auditing, and risk management. They will also be required to give their data freely to authorities and researchers, and adopt specific codes of conduct.

The platforms and search engines had been given until February 17th by the European Commission to publish the data on their monthly active users. That gave the very large online public platforms four months to publish their data before the Commission would impose fines upon them.

Twitter reported that it had 100.9 million average monthly users in the EU, based on an analysis of its data from the previous 45 days.

Alphabet provided two sets of data, with one based upon use by users signed into their user accounts, and another based upon signed-out users. Google noted users can use its services whether they are signed into user accounts or not.

Google reported the average monthly signed-in users totaled 278.6 million for Google Maps, 274.6 million for Google Play, 332 million at Google Search, 74.9 million at Google Shopping, and 401.7 million at YouTube.

Meta Platforms had reported earlier in the week that it had 255 million average monthly users at Facebook in the EU and roughly 250 million average monthly users at Instagram for the last six month in 2022.