FRBs are very interesting but I think they have to be natural in origin since the amount of energy in each recorded incident is far too great for such a signal.

FRBs are very interesting but I think they have to be natural in origin since the amount of energy in each recorded incident is far too great for such a signal. I can't see there being an advantage in putting minutes worth of Sol level energy into a dispersed fast acting signal unlike a coherent concentrated radio signal or even just a stray radio signal (like that of a ground to satellite communication) where the intention is obvious. It just seems to me FRBs are exotic radio sources but not something a technically inclined civilization would generate. Unless it's some sort of side effect of some other technical process. So, FRBs don't seem to me a likely candidate for ET signals.