I have no doubt there is air circulation in a microwave. But I highly doubt it's that uniform, active or even helps with the actual process with or without that dollar store strainer. All it does is prevent the chips from being soggy.
Based on my meager knowledge of what microwave ovens do to things, I'd guess any "chips" cooked in this thing would be hard, dry and yet turn into pasty chewy glop in your mouth, like a communion wafer.
If we knew how much pathos and heartbreak there was in the world of "independent inventors" we'd burst into tears when passing the "As Seen on TV!" shelf at the store.