The bill says “the responsible digital platform corporation must ensure that the supply of the digital service does not, in relation to crawling, indexing, making available and distributing news businesses’ covered news content ... differentiate between registered news businesses and news businesses that are not registered news businesses ...” I don’t see any distinction between linking and previewing here. I think both involve “making the content available,” and since Facebook legally can’t “differentiate between” news content that is and isn’t covered by the mandatory bargaining code, they are choosing not to make news content available at all to Australian users.