Trialware

Hello.

Thank you for your review.

The fact that the plugin has a premium type service is mentioned in the plugin annotation and in its WordPress catalog description:
https://ww.wp.xz.cn/plugins/cleantalk-spam-protect/

CleanTalk is a plugin with free code which works with the Cloud Anti-Spam Service: https://en.wikipedia.org/wiki/Software_as_a_service

These types of plugins are allowed in the WordPress directory, please look here:
https://ww.wp.xz.cn/support/topic/is-this-plugin-free-to-use-after-trial/#post-5336850

Kind regards.