Most people who make Pt/Pd prints use digital negatives these days. It allows them to make big prints and to control many factors which result in better prints. The practice has definitely resulted in better quality from the best printers. There are undoubtedly some people who would prefer, and possibly pay more for, contact prints from a camera negative. As long as you can make quality prints, there will be a market either way. The best marketing approach may be to be honest and to give full details: e.g. "Platinum print from an 8X10 camera negative printed on sized Arches BFK paper."