What exactly is an "exploding accelerator offer"? It it is a time-limited offer, what prevents other accelerators from directing YC acceptance? And if I put o

What exactly is an "exploding accelerator offer"? It it is a time-limited offer, what prevents other accelerators from directing YC acceptance? And if I put on my tin foil hat tight enough to cut off the circulation to my limited brain, then wouldn't a fake exploding offer tilt the odds in favor of the YC applicant?