Looks like Cashrewards have temporarily increased their referral offer to be $20 each instead of $10. A minimum $20 Qualifying Purchase by Referee within 90 days required.
Taken straight from the referral page:
GET $20 EACH
Tell a friend about Cashrewards and you’ll both get a $20 bonus once they make their first transaction of $20 or more.
Popular? Refer more friends to get more cash!
Offer expires on Jul 23, 2021.