Fellow user here. Is it forbidden? This user submits mostly content from his blog (sometimes twice), but I can't find anything against self-promotion in the gui

Fellow user here. Is it forbidden? This user submits mostly content from his blog (sometimes twice), but I can't find anything against self-promotion in the guidelines. This is the closest guideline: > Don't solicit upvotes, comments, or submissions. Users should do those things when they run across something they personally find interesting, not because someone has content to promote.