Nerval's Lobster writes: Amazon has expanded support for its Amazon Coins from Kindle Fire tablets to Google Android mobile devices.In its press release, Amazon positioned its e-currency as the ultimate in convenience for customers who don’t want their credit-card statements riddled with lots of micro-purchases from Amazon’s App Store. Expanding the currency’s reach is also a potential win for Amazon, which wants to create an end-to-end ecosystem for app developers. But Amazon Coins' existence could alienate the same demographic that made Bitcoin and other crypto-currencies such a hit. The company tethers the Coins to a user identity, and likely keeps significant records on its crypto-currency ecosystem: who buys what when. That concept is anathema to those online denizens who embraced Bitcoin as a way to make purchases without needing to reveal a real-world identity, or deal with a currency tethered to a central repository; genuine crypto-currency can be used to purchase pretty much anything from a purveyor willing to take it, including—in the case of Silk Road and other online bazaars—drugs and weapons. Indeed, Amazon Coins has more to do with a corporate “currency” like the now-defunct Microsoft Points than an actual crypto-currency like Bitcoin. But that hasn't stopped some people from getting confused about it.