Short write‑ups of problems we hit running a real commerce operation and what we changed in the code because of them. No product announcements; just the reasoning.
We asked eBay for new orders forty thousand times a day to find about twenty. A customer still waited eighty minutes for one. Why checking more often was the wrong fix, what we did instead (check the channels that sell, and check the moment a customer comes looking), and the column we added so we can tell whether it worked. Results pending.