Do you really feel compelled to share some a2k post or thread elsewhere? a2k has become an embarrassing dumpster fire (that's often rivaled the worst of reedit and 4chan). Too much QAnon garbage has been posted and allowed to remain up and gathered by Google where the dangerous falsehoods, errors, lies, and malicious conspiracy theories become quasi-legitimized and accessible for their continued spread.
In the context of the explosion of unfiltered blogs, news Web sites, amateur videos, and mash-ups, Wood (2013) has recently surveyed the scarce research on this topic. In his view, on the one hand, Web-based communication might dissolve conspiracy theories into highly polarized and radical (but overall irrelevant) narratives. On the other hand, conspiracy theories might arise to new levels of mainstream visibility and legitimacy, as observed in the case of the 9/11 truth movement (Wood, et al., 2012). While the diffusion of false news stories on social media has received attention (e.g., Mocanu, et al., 2014), search engines are understudied in their potential to spread and reinforce beliefs. Conspiracy theorists often invite readers to avoid traditional, mainstream newspapers and TV, and to do their research on search engines (see, for example, Figure 1).
As a direct answer to your possibly implied question, if you just want to repost a single post to social media, you can always screencapture it and post the image file.