Sure, Twitter users might be just fine with a link-only option to the Instagram photos they share through the Twitter platform. But, what if they're not? What if a significant portion of Twitter's massive base ditches Instagram either for Twitter's evolving photo filtering system or another app that plays nice with Twitter? Then what?

Maybe it won't be that big of a deal. Maybe it will. I lean towards the "it will" side. In fact, I think it could end up being a very big deal for Facebook. Why risk alienating that presumably sizable gaggle of Twitter users who use Instagram, but never use Facebook? You no longer have access to a base that likely numbers in the millions.

It just doesn't make a ton of sense. In these situations, becoming frenemies seems like the better route for Facebook. There's plenty of unrealized synergy to tap between the two dominant social networks.

Zuckerberg. Costolo. Partner, don't fight!

--Written by Rocco Pendola in Santa Monica,
Rocco Pendola is TheStreet's Director of Social Media. Pendola's daily contributions to TheStreet frequently appear on CNBC and at various top online properties, such as Forbes.

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