Just spotted this on Quidco Clicksnap. Bascially, Quidco are paying you £1 to eat chocolate if you buy it @ Tesco!
Available from Asda/Tesco/Morrisons/Sainsburys
Valid 17 Nov – 20 Nov, 2016
1. Log in or Join Quidco today (for free!)
2. Purchase the Cadbury's selection box in-store at Tesco (£1), Sainsbury's, ASDA or Morrisons (£2)
3. Upload your receipt to Clicksnap here: https://www.quidco.com/clicksnap/upload-receipt/
4. Await your £2 cashback bonus to cover the cost!
This offer is available from any of the specified retailers, subject to availability, and can only be redeemed once per offer period.
Promotion ends on date listed, although we reserve the right to withdraw this offer early for any reason.
That means once they have a certain amount cashback claims they will pull the offer! It's Quidco who are paying for the cashback on these selection boxes not the supermarket!