I personally think links to something like Reddit make no sense, since one of the reasons for being on a site like Burggit or many other lemmy instances is to try and separate ties from that website. I also feel linking to a reddit post directly discourages posting and discussing things here.
Screenshots or even images from reddit I don't think matter as much, just like how a link to a YouTube video wouldn't matter that much as that doesn't actively discourage discussion. Hope this makes sense, my thoughts tend to be rather scattered.