[2020.5 Update] As we expected, more merchants have pulled out of Shopping Portal. H/T: Doc
[2020.3] Like Amazon/Walmart, Macy's has also removed cashback from shopping portals. Macy's is a store many people use for everyday purchases, and the cashback rate was still quite high. At the moment, Bloomingdale's, a Macy's-owned department store, still offers cashback, and it is unknown whether it will be removed as well.
Under the pandemic, many merchants have been affected financially, and the deals available to us have also become fewer. More merchants are expected to join the movement to "protect their own deals." Hopefully the pandemic ends soon.