I don't understand blind boxes

More specially I don't understand 20$ blind boxes with little figurines in them, why am I paying 20$ for something and I don't even know what it is, are you serious??? Do you think I'm stupid??? 

It's the dumbest thing ever and I can't believe people enable it by buying them, I will NEVER buy ONE blind box for 20$ BRO

It genuinely pisses me off cuz I don't know what it is, and I'm not getting anything else out of it like candy or something, what if I don't like it??? Now I gotta spend another 20$ making it 40$????? What if I don't like THAT one either like what now??? 

Bitch, someone should just buy all of em, open them, and then sell them to the rest of us because ain't no way I'm buying something for 20$ AND I DONT EVEN KNOW WHAT IT IS!!!!!!!