I just took a very quick look, but I don't see anything obvious that says spam. I didn't look through your link profile in depth, but a cursory look didn't shout anything at me.
It could just be a competitor trying to scare you. It's a strange message to get though since someone who'd a competitor typically wouldn't want to alert you that they were paying attention and someone who wasn't a competitor should really have better things to do with their time.
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Maybe your spamming on your email account? Don't send advertisements to people without them joining your mailing list, that is of course, if you provide one. Not saying you are, but that's what they might have meant.
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A foolish consistency is the hobgoblin of little minds
Thought for today:- Is SEO the only industry where all the cowboys are Indians?
