Yeah this was one of the holy grail for me because it reduced the chance of these things being a purely manufactured conspiracy theory type object. My worry is that there might be more systems where they appear 'in the wild' and that those systems are in different regions of space.
If they're localised to Pleidaen space, that's almost better for us because it means that region is important and warrants further investigation.
One thing's for sure - it could mean some interesting surface finds in this area when Horizons drops.
To warrant that the region is of importance you might want to find a pleiades system, that is outside the 200 Ly bubble around
populated systems to see, if signal sources spawn there, too.
You get signal sources in the Hyades aswell...
You get them in the Col-Sector, too...
The UA drop rate is just so insignificant, that we have a hard time test it...