I am planning to sign up for a card from Bestbuy. Does Bestbuy offer any discount to card holders? I know Target gives a 5% discount when you use their card but I don't know about Bestbuy.

There is a 19% discount only if you use the code "no panties, please" verbally with the cashier. It also gives 90 days no interest on all purchases.

No discount, but you can either quadruple your rewards points or get no interest on the purchase for a certain amount of time (if the purchase is over a certain price point, iirc).