Sorry, this doesn't sound realistic (I work for a major HFT).

Do you have evidence that someone net a billion in a year making a market on a single name?

This seems to ignore that the effective bandwidth could be so low that the latency is greater than conventional transmission systems like RF. Since scintillation radiation detectors are highly stochastic compared to semiconductor RF receivers, I think it's probable it would take too long to receive the bit with sufficient confidence.

Scintillation detectors don't work like a solid state detector and have worse time characteristics.