Suppose we applied a basic test to a potential ad: does it sell a product or a service? If yes, you can buy ad space for it. If it's "selling" a concept, idea,

Suppose we applied a basic test to a potential ad: does it sell a product or a service? If yes, you can buy ad space for it. If it's "selling" a concept, idea, way of life, promotes a group, organization etc (basically, NOT selling a service or a product), it's deemed political and cannot be aired. Would that work?