As I've said in previous posts, I've now retired from the Aviation sector. Thus, I'm now a "customer", (and a bit of an enthusiast).
A couple of points - 1. I agree with Tightslot's point about getting replies. I've had useful, quick replies on pprune to semi-tech questions, which in the past I'd have asked by ringing someone up.
2. Talking to folk still in the sector, they don't ignore pprune, but are inclined to lurk rather than contribute directly. After all, lurking on this website is easier than contributing!