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One of the typical ways a site ends up with a huge number of links, but from a small number of domains, is if they end up with a link in a footer or sidebar - something that appears sitewide/on every page. Or from social media sites. In these cases, the huge number of links probably aren't adding a lot of ranking influence. That's not to say multiple links from one domain don't have value though. There are plenty of situations where an influential site could be linking to you in different contexts. These, I definitely believe, still pas ranking authority. And remember, the only purpose of links isn't ranking. If they're good links, they'll also be sending actual traffic and eyeballs! Hope that helps? Paul