In the early universe these black holes are the largest in the universe, able to eat not only smaller BHs and radiation of the vacuum but even all Fermionic matter as the start of a Quasar.
HOWEVER, Smaller BHs are NOT supposed to consume Fermionic matter due to their strongly curved Schwarzshield horizon able to repel spinning Fermions (string propellers with Calabi Yau disc surface) and channel them into two or even more jets.
Quasars are supposed to be the largest BHs able to consume Fermions, ending life as a Quasar in the middle of huge dead galaxies and the start of the contracting universe into a cyclic universe.
see also: https://dailygalaxy.com/2020/02/update-on-the-monster-12-billion-years-later-is-xmm-2599-the-hub-of-a-metropolis-of-galaxies/
See also; The Magic Fermion Repelling Stringy Fuzzball Black Hole, the Origin of a Cyclic Raspberry Multiverse.
XMM 2599 Potent
Big Crunch Black Hole Quasar:
2x Fermi Bubbles with Gamma jets ending into Fermion repelling Galaxy Anchor Black Holes (GABHs) , Ejected from the Central Black Hole: Sagitarius -A.
The largest Black Holes do NOT repel Fermions, and become A QUASAR, they eat all Fermion matter and EVEN stars.
The critical Schwarzshield diameter is not known!
