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I can think of two reasons: A) content posted on the other post also appears on cadwallr's website, which as another user pointed out could drive more traffic to the website, which lil is avoiding; B) lil, and some other hubski users, have their real life names associated with their usernames, and so may wish to be selective about what posts appear on other peoples websites or are in other ways "trace-backable" when lil or others may not want to be traced back to the content of the original post.