I’m not a fan of Instagram. I don’t believe it allows you to tell a story with your photos in the best possible way. However, I realize many of you adore the app, which is why the above link may be troubling.
Update: Instagram was just sold to Facebook for $1 billion. So, that was their business model all along - as is the business model for all “free” apps and web services…capturing and selling your information. Very profitable; and you did all the work.