"CatGenie can't run without SaniSolution, like a car can't run without petrol." is often heard. But that's a flawed analogy and an insult to most people's intellect because it's the laws of physics that prevent a car from running without petrol, but it's a flaky business model that prevents CatGenie from running without SaniSolution.
But a better car analogy would be:
"CatGenie can't run without SaniSolution, like a car can't run without Esso."
So if you want to use BP, Shell, or Total in your car - no can do.