IOU seems like a feasible idea except the prices would be non-realistic for several reasons one of them being that surrogate shittoken is not reflective of the real value carried by the native currency of the platform. IOU is a surrogate whose purpose is to be tradable several weeks away from the official release of a HEAT token. That being said, if u surf through whitepaper and take a decision to buy in on IOU, and then something goes wrong with the fundamentals, or even worse, the release date is delayed, IOU prices might tumble thereby u might exchange IOU for HEAT coins at lesser ratio than what u bought them at.