Yeah, "Amazon no longer being able to dodge sales taxes" was the deciding factor here. Now that you and Jeff Bezos can compete on an "equal" playing field, you're, to paraphrase a bit, "ready and willing, able to sell."
And not a moment too soon really! Just a week or two and Amazon's grip on the quadrillion dollar bee-pollen, unsealed nutritional supplements of dubious origin and white-label workout equipment businesses would have been so firmly entrenched, that not even you could have toppled them.