The US based and regulated cryptocurrency exchange Coinbase, is offering users who hold Dai on the exchange platform. This will be available to customers in 6 countries which are The United States, Spain, Netherlands, France, and Australia. Only customers within these regions are eligible to earn the 2% annual returns.
The official Coinbase blog post states that customers in the stipulated regions with at least 1$ worth of Dai in their Coinbase accounts will automatically receive rewards on a daily basis with the initial payments distributed within 5 business days.
Customers can choose to withdraw these daily rewards anytime they want even if they choose to do so immediately they receive the rewards. Dai held on exchange can also be withdrawn at any point in time wince funds are still under the control of the owners.
For users who wish to start earning Dai rewards, they can simply buy Dai on Coinbase or send it from an external wallet to their Coinbase wallet, and they start earning automatically.