Forum Moderators: open
Spamming only google know their limit, you should be fine with the suggestion below, just don't repeat it all over again and again.
I would suggest reading:
[webmasterworld.com...]
[webmasterworld.com...]
And the Google Knowledge base (Link can be found in the Google Forum text)
Pendanticist.
Blue Widgets Blue Widgets Blue Widgets Blue Widgets
in favor for:
Find Blue Widgets at Widgery.com.
The lesser consideration is a competitor who doesn't like the fact that he "can't get to #1" because someone else is there, and actually has Blue Widgets for resell thus not necessarily spam, even if the listing appeal is not the best.
Very few sites actually get caught for "spamming" but this isn't an acknowledge for advocating doing it.
As other members, lean towards less repeating not more.