Originally Posted by Majuki

Chase doesn't specifically exclude gift cards like some other issuers, but they have broad discretion in the sense that if they think you are gaming them they have the ability to close your accounts.

If you are using the portal plus Freedom Unlimited, that is as intended and won't present any concerns. My point was assuming you were going into an office supply store, buying gift cards that could be used at Home Depot for the 5x on the Ink and then using those gift cards for yourself (not reselling them). If you are doing this, you might not receive that courtesy call from the issuer. They will simply shut down the account since your behavior matches people who are engaged in true MS.