I sometimes notice a merchant's cash back amount increases or decreases. Why? There are several reasons that this can occur. The most common is that the cash back rates of the merchants we feature on Hoopla are subject to change based on the merchant's terms. Also, we may feature temporary cash back rate promotions for a limited time, which may increase cashback rates for a period of time, followed by a decrease to the standard cash back rate for a specific merchant or group of merchants.