No, they don't collect data from Discourse installs when you host them yourself.
> CDCK sets only its own privacy practices, not the privacy practices of CDCK customers or others who host Discourse forums for themselves or others. You should ask all of those involved in administering and hosting Discourse forums that you use for information about their privacy practices.
> CDCK sets only its own privacy practices, not the privacy practices of CDCK customers or others who host Discourse forums for themselves or others. You should ask all of those involved in administering and hosting Discourse forums that you use for information about their privacy practices.