Something I never thought I'd see (especially with the rise of AI, and AI Images on Pinterest), I just saw Yeonjun's story where he shared a link to an account with various photos, for the promotion of his album 'No Labels'. It currently has two boards, and 87.8K Followers!
I believe he isn't the first artist to do it, but I love seeing artist use the app, its a very smart marketing move considering how many of us use pinterest for kpop related things, and keeping track of our pfp's.