Not sure how to do that. For now there is a Nostr link under my Take pic, at least. 
Discussion
Good article, btw, and I totally agree with you!
My assumption would be that the nostr:npub1t8a7uumfmam38kal4xaakzyjccht4y5jxfs4cmlj0p768pxtwu8skh56yu design/dev team need to add Nostr as an option/icon/URL field in the website’s back-end, before you can input your npub/nostr URL.
Maybe anyone who submits an article or “author bio” to BTC Mag should include their npub in that submission, and show demand for nostr visibility
+1