I don’t understand your point. Are you saying they’re defunct?
Of course they have crews. I doubt they’re all scraping by. They are sure not as well off and well organized as the other four families, but you don’t need to be a Capeci to assume that even the Colombo’s must have few decent money making decina.

Remember, we (obviously) compare them to the other NY families. If compared to Philly or Boston, for instance, the Colombo’s would look like the Royal Family.