Freebird - Freebird is a cashback and shopping rewards platform that allows anyone to participate at no cost.
Paribus - Find out for free if online stores owe you a refund!
TopCashback - TopCashback names itself the UK’s most generous cashback site. They offer cashback on over 5,000 retailers with a variety of payment methods including gift cards, PayPal and bank transfer.
Lolli - Earn bitcoin when you shop online
Slice Watch - Get an email when an item you've added drops in price 💸
Upromise - Upromise is the cashback coupon and rebate site.