I seem to remember that on capture day, if you captured 100 horses you'd be entered into a draw for one of them to be turned into a WWW mare. What happened to that and why don't we have it anymore? Is that what a capture party is?

yes, I believe that's what a capture party is. Capture day just gives 50% off captures, plus a week of fun stuff :3

Did capture day also have discounts? We haven't had a party in so long I don't remember 😂

increased chance of a better rated horse on capture day