Amazon Coins have launched in the UK with Kindle Fire owners now able to buy the Amazon credit to spend on apps and in-app purchases.
As a little launch gift/bribe to get you using them, Amazon has given everyone with a Kindle Fire £4 worth of free Coins.
£4 seems like a strange amount - why not round it up to £5? - but hey, who are we to look a virtual gift horse in the digital mouth.
When you bulk buy Amazon's Coins you'll get discounts of up to 10% which is nice but they can only be spent on apps and games in the Amazon Appstore, not music, movies or books.
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You won't be able to spend them in the traditional Google Play app marketplace either.
Existing Fire owners will find the free £4 in their Amazon accounts today, while Coins will also be available to customers who have ordered the new Kindle Fire HDX 7 and Kindle Fire HDX 8.9 when they receive their devices.
- Are Amazon Coins enough of an incentive to get a Kindle Fire? Probably not, so read our Kindle Fire HDX 7 review instead