see: Microlensing constraints on primordial black holes with the Subaru/HSC Andromeda observation https://arxiv.org/abs/1701.02151
Which is suggested to negate the Hawking idea of tiny BHs .
However, in Quantum FFF Theory, it could mean that the Hubble constant is extra crushed to pieces
by the existence of larger than tiny dark matter black holes with influence on the redshift of light passing by.
According to Quantum FFF Theory, Black Holes are indeed the same as Dark Matter as Hawking suggested, but at all BH scales.
Black holes can have different sizes from the Higgs 125 GeV up to the central Milky Way BH and more central BHs even able to merge into a Big Crunch BH, as the base for a cyclic raspberry shaped Multiverse.
If the Big Crunch black hole stringy nucleus is supposed to become in equilibrium with the outside vacuum pressure, the nucleus will explode into chunks of different sizes and partly evaporate into the oscillating vacuum lattice with a tetrahedral shape ( in pyrochlore form)
Equal sized chuncks will form huge Herbig Haro bowshocks with star and galaxy creation in between..