I do think people should crosspost more, and not just their own posts
kinda off-topic, but lately when I do cross-posts I like to add the original community link at the top (just in case people are viewing from an instance that isn't federated with it, or their client doesn't show the cross-posts correctly)
like if you crosspost this post, the default body text will start with:
cross-posted from: https://lemmy.dbzer0.com/post/29508559
but you could add the community like this
cross-posted from: [email protected] | https://lemmy.dbzer0.com/post/29508559
been thinking of submitting a pull request to do this automatically, but I'd have to setup my test environment again... if anyone wants to do this, the code is here: https://github.com/LemmyNet/lemmy-ui/blob/0.19.6-beta.9/src/shared/components/post/post-listing.tsx#L956-L965 in the crossPostBody
function, it might be good at least until Lemmy supports instance-agnostic links to posts