"Likes" have been an important currency on Facebook, a way for users to opt in to receiving updates and for marketers to estimate a page's reach. Over time, it became a common practice for pages to offer incentives for users to Like a page, such as contests, coupons, discounts, and deals. The practice even earned its own distinctive name: "Like-Gating." A recent post on Facebook's Developer's blog, however, markedRead more
