Yes even though we have used the £15 voucher yesterday we are still getting emails that it's still available to spend (tried it don't work), honestly I spend a good few hours a day looking and buying on eBay, yes I'm sad and bored because I work from home, I have never seen the 5% or similar voucher you mentioned, maybe I should log off completely and leave eBay for a while and see if they try to entice me back with some kind of offer...