That doesn't really make any sense. The treaties to stop enriching uranium always offer far more economically in return than a nation gets for doing the actual enrichment. That's how everyone knows it is for weapons. If you would earn $5 doing something yourself and someone offers you $10 not to do it, and you refuse, then you are getting something other than the $5 for it. In this case you are getting weapons production capability, which is why you were offered the extra money not to do it in the first place.