If I run FB ads for a paid webinar (registration fee, let's say Rs 100) and if my cost per lead is, let's say, Rs 500, then, if I increase my webinar registration fee to Rs 500, would the cost per lead increase too? What if I increase the webinar fee to Rs 1000 - will the cost per lead keep increasing? Will the CPL be always more than what I charge for the webinar?