I think it would be more of a "Why didn't think of that?" type of thing with the other Megacorps. If the AAAs don't go after Aztlan and that AAA for blood magic, which I think is fairly public because of Dunkie's will, and didn't do much when Aztlan nationalized other corporations assets they aren't going to do very much at all.
Now Knight will probably blame his enemies and try remove one or both in a very public way and in the shadows I see that happening.
The court doesn't strike me as magic savy, at least enough to know all the downsides of various magics.
Lowfry, on the other, hand will probably try to use this to try and get more business around the world, especially in UCAS playing the" I have seen this before and it ends badly card. "