If I join Sift, how much money should I expect to get back? Kristen C February 15, 2017 21:47 Updated Follow It all depends on how much you spend (in particular online). We estimate that you can get back >5% of all the purchases that we track for you. Related articles Does Sift only track my online shopping? How does Sift make money? What retailers are supported by SIFT? What are "hidden benefits"? What is price protection? Comments 0 comments Please sign in to leave a comment.