Just had this email from ebay / nectar. Check emails as usual will be account specific...
Ebay offering new nectar stamp card offer where if you complete 6 of the stamps between now and 11th December you will get a special reward in nectar points. It says to stamp these off
1 - Visit ebay in 2016
2 - Subscribe to eBay communications
3 - Shop on eBay
4 - Authorise your nectar account for eBay redemption
5 - Redeem nectar points on eBay
6 - List and item to sell
7 - Suprise BONUS?!
No need to do in order and you get your reward in January after being told what it is in December - just in time for the sales....