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Unfortunately, it can be murky and very situational. Optimistically, I tend to agree with @Paddy - this should be a good thing, and you're not doing anything wrong. I'd hate to see you shoot yourself in the foot by cutting these links or harming your core business. Practically, though, I have seen situations where the duplicates started to cause problems or the scrapers or partner began to outrank the source (you, in this case). There's no easy answer, I'm afraid, other than diversification. If you can build a solid link profile beyond these links, have solid social signals, and generally appear to be a brand in and of yourself, then duplicates and other issues will have less impact. If you base everything on these links, you could start to run into trouble. I'd be hesitant to tell you to cut valuable ties and relationships. For the most part, these links are positive. I'd just make sure that you've got eggs in other baskets.

Anyone else have any opinions on this?