For instance would this be regarded as spam?:
If another Hubber leaves a reasonable comment then adds a link to a commercial 'external site' (although relevant to the Hub topic) would you 'allow' the comment or put it into the 'spam' folder?
It may sound a little like a cop-out, but it's something that I kind of take on a case-by-case basis. If it seems like something that would really be useful, or add to the hub, then I'll approve it. I mean, I'd like it if my hub(s) answered all questions and eliminated the need for other resources, but that might or might not be the case LOL. If it just seems like a way to get a free plug for someone's site, though, I would be more hesitant.
You can help the HubPages community highlight top quality content by ranking this answer up or down.