Happy Birthdates is a great site that gives you a chance of winning back 100% cashback from your Amazon purchases up to £10,000.
To receive the cashback, you have to win 1 of the 10 daily £100 draws.
It's free to sign up here: http://www.happybirthdates.com/invite.php?m=dannyatb9
I have recently created a list of survey sites to use over on my site, if anyone is interested: https://moneyskipper.com/surveys/
You may already be signed up to them all or you may find some new ones. Hope you enjoy and thank you for checking it out if you do.