As it's a way to introduce yourself, it doesn't look good in general if people are doing more than one post using that tag. However, I have seen many users over time that has done more than one introduction post.
I guess it's a matter of what you say, and how you present things.
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Oh, I was just concerned because I heard rumors about hive police marking those who made more as spamming and banning them in hive. Just rumors though. Not sure how credible that is and the term spamming is kind of vague. There's no certain rule on that.