I opened the ebay app just now and this popped up. It also showed up when I went to ebay on my phone browser. Only select users will get it, so very YMMV.
Who's eligible for the Coupon?
Only invited, registered eBay users who see the Coupon in eBay are eligible. Sorry, no forwarding—Coupon is not transferable.
How to redeem your Coupon:
Shop for eligible items. (See below for exclusions.)
Pay for your item by 11:59 PM Pacific Time on the Coupon expiration date.
Enter the Coupon code in the redemption code field.
Terms & Conditions
The Coupon will expire at 11:59:59 PM PT on the date shown on the Coupon. Discount applies to the purchase price (excluding shipping, handling, and taxes) of an eligible item on eBay.com. Eligible items exclude items from the Coins & Paper Money, Gift Cards & Coupons, Vehicles and Real Estate categories. Coupon can be used once for up to the maximum Coupon discount amount, while supplies last. Restrictions and/or exclusions will be designated in each Coupon offer. Only registered eBay members can receive the discount. Any unused difference between the actual discount amount received and the maximum amount will be forfeited.
Coupon is subject to U.S. laws, void where prohibited, not redeemable for cash, has no face value, and cannot be combined with any other Coupon. eBay may cancel, amend, or revoke the Coupon at any time. Use of automated devices or programs for Coupon redemption prohibited.