I agree with the top comment that automated matching is a bad fit for regular hiring.. but I don't know much about freelancing, so maybe it's a better fit there.
I have a Gmail filter in place that looks for keywords in incoming mail ("urgent requirement", "formatted resume", etc) and sends a canned response which includes my Nectr profile. In my profile they can see if I'm available, my rate, whether my skills are really a fit for their position.
Gig work markets such as Upwork and Fiverr target mainly the low end of the freelancing market. Companies looking for freelancers can post there too.
I have freelanced for over a decade, getting work by word of both, referrals, and through an agency. I haven’t used a resume, or been asked for one, in all that time, nor have I been matched through a web site.