Why would I have exactly 4 new followers immediately after I post, happened twice today?

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I noticed something odd today, I made 2 different SteemIt posts and each time I got 4 new followers at pretty much the exact time I posted, they didn’t upvote my post or comment. I’m thankful and appreciative for the followers but thought it was odd. Is this just a coincidence or is something going on I don’t know about?