Your post is useless there, since it has already been explained in a better way.
But this is still strange, you got banned for that without a warning.
Paid sig spammer, either doesn't bother reading threads he's replying to (likely since he seems to post every minute or two on average), or repeats posts just to increase his post count. Not something easily seen just by looking at one's post history.
You were a second faster than me. I respect your decision, but it seems a lot compared to P.G. who got 7 days.