It was a tongue in cheek comment that was maybe a wee too subtle. To the extent that Amazon launching Kuiper is tied to (maybe still?) majority owner Bezos' interest in building supportive business for Blue Origin, then Kuiper launching on SpaceX is an irony that cannot go unobserved. One might even say Blue Origin as an orbital launch provider is more "vaporware" than Kuiper itself given the latter's test existence in orbit.