The PM sounded way too canned to be targeted. If you want to avoid issues like this, one thing that can help is to individualize each PM by specifically quoting the person where they mention that they could use your services. If they report it, you still might get banned anyway, but you're much less likely to be reported in that case. We also might be more lenient about that as well, depending on how individualized it is.

I don't generally take action on PM reports (too many chefs and all that...), but by reading your PM out of context, as we see it, I can see why you were banned. The PM was completely canned in terms of its content, and with no way for us to know how many people this was sent to, we could only assume that based on that content it was sent to between 10 and 100 people.