Is this SPAM because it's about a commercially-supported freemium plugin, because it the answerers only two contributions and because he didn't even have the sense to vary his answer? Or is his answer a legitimate answer because it in fact seems to answer the questions (although I've not downloaded his plugin to test, nor set up tests to verify?)
I'm inclined to say it is not SPAM but instead a legitimate answer. Just because it's a commercially-supported plugin and he doesn't doesn't seem to be here for other's benefit doesn't mean that it's not a legitimate answer (assuming the plugin really does address the question.)
I want to know about commercial solutions instead of just free how-to code examples or references to free but essentially unsupported plugins so I would hate to discourage vendors from posting links to their plugins for fear of being called spammers.