Citibank seems to make "too good to be true" offers like the $100 rebate which worry me and have me looking for the hidden trap.

For instance they've sent me (acting for AT&T's Universal Card) a 4% balance transfer offer, good till paid. That's pretty cheap money. They reserve the right not to honor the convenience check they gave me to invoke the transfer, and would carry over higher-rate balances till the cheap transfer was paid, so I'd want to be sure the account was paid and unused during the period. (Which action I'd hope would not cause them to decline the transfer.)

I'd begun to think they were another Providian itching for the chance to spring a trap, but people here generally seem pleased with them. Where's the catch?