There's an additional key point that missing a single tooth-brushing does not cause cavities. If it did and: - you knew when a person was out of toothpaste and

There's an additional key point that missing a single tooth-brushing does not cause cavities. If it did and: - you knew when a person was out of toothpaste and going to the store to buy it - you could implement differential for customers, singling out the customer(s) who have run out of toothpaste - you could control pricing for all stores at which customers could buy toothpaste Then yes, you could extract the full value of your toothbrush product. Whether this makes it a platform would remain up for debate. I'd just call it a toothpaste monopoly.