They seem to have a technical solution but I'm not seeing a user view beyond "pay a little for one piece". How many times per day do you want to decide if the price is right? How do you avoid clickbait? What is the return policy?
Don't get me wrong, the other models also have problems and I'd love to see this one work, if nothing else as another tool in the box. But the tech part has been solved before, it's not the bit that's been missing.