I logged into my ebay app to get something, it was headlined at top of the app to claim £5 off.
Some of my friends and family got it, but not everyone did. I posted on another forum about it and some having issues with it.
But worked fine for me.
I assume Ebay are reimbursing sellers. As they often do 10% of orders from £50-£75. When thinking about it all Ebay are doing is not taking there 10% fee.
Seems not everyone is getting it.
Best to check your account.