… at Google.
From memory, I believe that:
TradeSports imposes a 4-second order-entry delay on some sports and live entertainment contracts to compensate for the varying delays with which members see an event (radio vs. tv; cable vs. satellite; etc.).
I wasn’t able to trace this bit of information in their Rules and FAQs. If you are in position to confirm or inform, please let me know in the comment area or contact me, and I’ll publish a follow-up note here.
