Coupons are now handed out at some time intervals. On the page with the promotion, there is a countdown to the next distribution of coupons.
On Aliexpress, when clicking on the corresponding banner, there is a “Vote” button. The first 20,000 voters give a $ 5 discount coupon for purchases from $ 25.
UPD: Validity period 07 Apr, 2017 ~ 17 Apr, 2017 Restrictions: cannot be returned.
The vote leads the assumption that the 100 millionth buyer will be from Russia.
UPD: direct link (thanks allll)
Go to the store