I saw an ad for a restaurant that said it had half price appetizers from 2 pm to 4 pm. This is because that is a time between lunch and dinner, so there isn't much business. The restaurant is trying to get people in. I get that. But what if it was advertised as "appetizers are double priced 9 am to 2 pm and 2 pm to closing." In other words, the price structure is the same but it is advertised differently. If an item is $10 normally, and $5 from 2 pm to 5 pm, then why call $10 normal and $5 half? Why not call $5 normal and $10 double?
How about when something is sold as buy 1 get 1 free? Can I just have the free one? Can I return one, get my money back, and keep the free one?