Cap test: recalculate rewards after monthly/annual caps and excluded categories. Redemption test: use the value of the reward you will actually redeem, after transfer ratios, minimums, expiry and fees. Debt test: assume one month in which you cannot pay the full statement and compare the disclosed finance charge and loss of interest-free treatment with the year’s expected rewards. A card that wins only when every promotional assumption holds is a fragile choice.
Also separate issuer protections from card-network marketing. Chargeback or dispute rights depend on transaction facts, prompt reporting and the issuer’s process; they are not a blanket warranty for every purchase. Read the current MITC, schedule of charges and billing/dispute instructions before activation, and save the version that applied when you accepted the card.