I doubt Amazon drone deliveries are what the FAA was considering with this proposal. More than likely, DJI Spark type of aircraft is what was considered where the pilots are looking to acquire video footage. Although a quick lookup shows the Spark to be slightly heavier than 0.55 pounds. That thing is tiny, so if it doesn't qualify for this proposed rule, then the crafts that do qualify would be more along the lines of toys. I was under the impression that the Spark was just about the smallest useful drone available. By useful, I meant can generate a decent quality image.