Hard to say. One way is that they say got 100K in sales on 10K in ads. Then they said, hm, lets take 50K from sales and put it into more ads so we can get 500K in sales and the remaining 40K went to tooling/production. When that 50K ad buy didn't really pan out, now they have 40K towards fulfilment which probably doesn't meet their suppliers MOQ if it even covered the NRE (non recurring engineering) and tooling. Its more or less the same problem that all companies encounter when they do preorders/crowdfunding/etc.

There is a solution of course - you need to raise enough money (or commit, in the case of Tile founder who should have had enough personal capital to make this work) to never be in a financial position that you couldn't simply return all your customers money in the event that the product or business didn't make sense. As long as you can gaurentee that you hold onto enough money for the returns, you are operating responsibly. If you take 100% of the money you get from sales and commit it, you cant take back ad spend or tooling/engineering spend. Is it fraudulent - I'm not sure. Is it irresponsible - most definitely.