You could still get work from it, I don't advertise at all and get all my private jobes from the gas safe website and word of mouth. But I get calls off the gas safe website that I turn down that are not gas related ie move rads, fit bathroom. These jobs are too big for me as I sub contract during the week and like to be bits and bobs on the weekend and take time off during the week for bigger jobs that may get ie combi swap etc.
So these jobs that are not gas jobs could be going to people on the forum and helping lads on here that know their stuff and are not cowboys and can be trusted