TopCashback was founded in 2005 in United Kingdom and expanded their business to United States in 2011. They support cash back retailers majorly from U.K (considering the good relationship they’d built in U.K market), but they also support the major retailers in U.S.
As stated in their brand, they tend to offer higher cash back rate compared to other competitors in the market, it is worthy to check around from time to time on TopCashBack, frequent campaigns offers double or triple cash back rates which helps you to save a bunch!