I presently work at Defense Innovation Unit where pretty much all we do is test and evaluate prototypes on behalf of the services and agencies. We spend hundreds of thousands to millions testing each thing. Because hundreds of millions of dollars may be spent based on what we find. We probably get 80 pitch decks for every area of interest we announce. That usually gets winnowed down to 5-10 that actually have technical merit and are responsive. We get a few shysters with every batch, but the vast majority are simply too optimistic about what they've done or what they can accomplish.