No experience, but googling "billshark review" gets all kinds of hits.
I didn't know that this sort of service existed.
It seems service is the booming industry now.
Uber driving service
home cleaning, lawn and decorating services (they've been around a while)
meal and grocery delivery services
dog walking, clean yard of dog waste
junk removal
baby proofing
Install, take-down holiday decorating
Lots of options for side-gigs or part time self-employment for semi-retirement!