Do men value women they pay for?

I decided to go 50/50 on a date with a guy who asked me out. Most girls at my school thought I was crazy for doing this but I did. He stood me up and never came. He started flirting with another girl two weeks later. - I felt cheap and worthless. I wasn't a gold digger and guys still treated me like shit. - I have countless stories like these. When I'm paying him or I expect little to nothing from the guy I'm treated like shit and disrespected. When the guys buy me something or pays for the date I'm treated better than when I split or he gives me nothing. For years men talked about gold diggers and how they're these horrible people and first dates should be 50/50 but every time I follow this logic It's like I'm disposable. Why is this?