Commons:Paid contribution disclosure policy
This means disclosure for paid editing on Commons is not required, but editing without disclosure of payment remains not allowed on any project that hasn't adopted an alternative policy. As of February 2019, only Commons, Wikispecies, Mediawiki and Wikibooks in Russian have adopted an alternative more relaxed policy. The alternative policies on Wikipedia in French and Italian require disclosure of payment.
See also this related essay: Guidance for paid editors