Hello, to answer your question check out the guide to adopting here—it lists for yourself. In general though, you need to have been on the wiki for at least a week and no admins have edited in 60 days. Cheers!
It was a redlink, I think, because that user hadn't created a profile here. Plus, if they are going to have a link to a profile, it makes for sense for it to be a link to their profile on the wiki that they're trying to adopt.
I've read your blog about the Dev Wiki and I really like it! Also, I've translated this into the german language, credit you and linked it as interwiki link. I would love if you link this blog (through interwiki) in your post as well. :)
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