It says I got mine for this post. ^
(you can check under:
Username → Summary → Badges
Scroll down to whichever Badge you’re interested in and click on the title (eg. First Link), and it’ll tell you the Topic where you received it, click on that link and it’ll take you to the post itself 
)
I thought I’d got my badge for linking like @Ace12345 did above, but now I’m not 100% sure? I think that way (according to Discobot) is called OneBoxing, and that was a separate Badge. I think LH have turned it off for external sites, as it only seems to work with forum ones.
If anyone knows better please let me know. 