here is my real life experience.
I ride too hard and far from home to suffer the cheapness of not changing the chain ring/sprocket. To each their own I guess. What is the cost of the rings? I cheap hotel room? Don't get me wrong, I am one cheap sob but when it comes to my bony butt I spend the money.
Oh yeah, all the front sprockets looked like this one too. I hope you at least fipped over your sprockets, no?