---- Google Guidelines - Link Schemes and Forum Signatures?
commanderW - 3:27 am on May 15, 2013 (gmt 0)
I think the salient point here is in the term
Forum comments with OPTIMIZED LINKS...
The example is structured in a deliberately spammy way -
paulís pizza san diego pizza best pizza san diego
So I believe this means that simply having links to your site in a forum is not counted against the site. That makes no sense anyway. But it does seem to say that if you make a spammy post, and your URL is the subject of that spam, then baby, you'd better be selling Viagra!