I'm signed up for a free/basic GigSalad membership. Most of the leads I get are not useful to me or any of the various ensembles I book. Still, for the few gigs it's added to the schedule this has proven to be a very reliable and well thought out operation. Some hiccups early on, but the system has been improved.
After several years using GigSalad, I'm not going to become a paid member -- most of the leads I get don't fit into my tour schedule -- but I am very satisfied with the service I get for the commissions I pay on the occasional gigs that do work out.