Income taxes, sure, but for a while nobody had to pay sales tax on out-of-state internet sales. I could see someone not realizing that had changed. Theoretical

Income taxes, sure, but for a while nobody had to pay sales tax on out-of-state internet sales. I could see someone not realizing that had changed. Theoretically they should have gotten good help from a CPA by then, but if it's a largely automated business and it suddenly skyrockets, it might be easy to just enjoy the money rolling in without taking it seriously enough.