i think the morning is the best bet but depending on your time zone I would extend it, for example. east coast I would say anywhere between 2am-11am because unless I'm mistaken since they do breakfast in the morning, no one is going to be buying big boxes during that time, meaning the only people who are entering codes are the guys who are saving them to enter in the morning. so if you're on the wescoast and you think 9am is a good time, in reality thats 12pm lunch time on the whole east coast. at the same time late night might be good as well, I'm sure there aren't a ton of people at taco bell after 10pm on the west coast compared to 12pm-7pm. and as always, during the weekdays theres less traffic in a store than on a weekend, so that should mean better odds