Today I Learned:
1) You know how you can tell Facebook to hide a post and not show other posts like it? It's an important tool for Facebook to learn what users don't want to see, and what you, in particular, don't like to see. Today I learned that there's an important outlier in hiding that skews Facebook's data significantly -- it turns out that a very small fraction of the Facebook userbase uses the "hide" feature on *everything*, including things they read and like. These "superhiders" use the hide feature to mark which posts they've read and get them out of the way, like an archiving system. They also account for a majority of Facebook's hiding data, which rather skews the company's feedback.
More info (from Facebook) at http://ift.tt/1OIyVak.
2) MMO developers typically plan on 1-5% purchase rates for optional purchasable items. I'm sure it varies by game and item, but it's a nice order-of-magnitude number to know for calculating MMO game incomes.
3) Mark Zuckerberg has publically announced his New Year's resolution for 2016 -- he's going to write an AI to help manage his home, a la Jarvis. Thanks Mark Zuckerberg!
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