The number of arrests of Capitol rioters is like at 400 now, so if it's only 100 then it won't include them. I'm sure this is just a standard batch of cronies along with a few people actually deserving of it thrown in as a 0.
Unless it were to be a blanket pardon, of course.
I don't think "blanket pardons" are legal. Haven't there been several cases around legality of using an autopen for mass pardons, which of course would not be necessary if one could issue a blanket pardon?
You don't need an autopen for 100 signatures.