You see this type of services is not meant for companies in the crypto industry as the market is not ready yet. Even coins that have their own blockchain and app developed before completion of their ICO, still have difficulty in making the necessary conviction to investors ( that tells the level of degeneration in terms of trust) talk less of people putting their funds down for a proposed workable product.
I agree that there is a selling model on pre-orders, but this differs from the idea of LPO - because LPO is internally held with a limited number (for example, a limited number of licenses for your product) and with a significant discount that will not be represented in regular sales.