Such web pages tend to stay up for a while after the application time expires, simply as a reference to those who applied in time but may not have gotten the card yet or just got the card and need to review the signup info.

Meanwhile, based on past history, they're not likely to repeat this exact offer, instead, they're likely to come up with continually new and slightly different offers.

There's the famous 25k for $750 spend in 4 months on 3 types of cards that expires at the end of May. And then there's 20k or 15k for $250 spend (no number of months mentioned) with 1st year annual fee waived for a Visa here that expires at the end of June. And I'm sure there are some other 20k versions still around too (for MC).