I get that you feel like you could design a better Go module proxy. It would be weird if you couldn't, because you have the benefit of seeing what happened when we deployed this one†. Congratulations? It's an achievement, I guess?
For my part, I'd be thrilled if just a single person could articulate exactly what the impact to DeVault's code hosting service would be if he took the Go project's offer up on just not having them clone modules hosted on his service so often. Anybody at all, if you could just explain what the problem would be here, I'd be forever grateful.
† (to wit: Go got a lot better, and apparently just 2 source hosts on the entire Internet had a problem with it, one of whom was fixed directly and the other of whom is apparently still mulling whether they want to burn the extra bandwidth for a cacheing benefit that literally nobody on the Internet seems to be able to describe).