In case anyone still cares …
The Numbers: Week 51

It looks like Countdown’s sales crept up there at the end. Based on that curve and the close to 52, I can only assume that the final issue will continue that trend.

Best guess? Maybe Countdown’s closing upswing is more consistent than 52’s because Countdown was leading to Final Crisis — not that Grant Morrison was aware of that, mind you (for more on that, check out our Book of Doom review of Final Crisis #1 this weekend). But the idea, true or not, that the final issues of Countdown were a primer of what was to come might explain why readers consistently came back to the series in its waning days.