If the bar for fraud was set that low, I bet half of failed startups would be considered "fraudulent." More than half if you look at restaurants.
> Fraud is generally defined in the law as an intentional misrepresentation of material existing fact made by one person to another with knowledge of its falsity and for the purpose of inducing the other person to act, and upon which the other person relies with resulting injury or damage.
Unless you have some damning email or other disclosure you'd never be able to prove that they knowingly sold scooters they never intended to fulfil, therefore fraud is out. In fact all the evidence seems to indicate the opposite, that their long term goal was to make this a successful business and grow until the money ran out.