Probably not in many cases, probably it is in some cases, there is still no secret, though. If you want people to knock in a short time, paint your door in a colour they can’t resist knocking.
It’s like with everything else, anywhere else.
You need a marketable skill, you need to present it attractively, ask prices that make people want to buy, stand out among your competition if there is more competition than people wanting to buy, you need to be ready to work hard, smart, or preferably both, you can advertise your gigs in a smart way (i.e. don’t spam social media but advertise where potential buyers are and in a way that makes them curious/want to click/buy - plus in a way that makes the social media, forum or wherever you advertise not want to ban you), … there are lots of things you can do but none of them are secrets. All common sense and ideas and tips readily available in lots of business books, on the forum and the internet at large.
There are no secrets or tricks, never mind how often people ask for them. It’s just research, apply, trial and error, …