Peter, for a long time I've believed (rightly or wrongly) that potential clients for outdoor pursuits providers are unlikely to come via specialist interest group forums (such as this) where the degree of knowledge possessed by subscribers is, by default, sufficiently high that they already know how to organise getting a trip. Therefore, by logical extension, there's nowt to be gained by touting for trade on such a fine forum as this - and, more to the point, I'm only doing work to earn a living, not get rich! (as if that were even possible! :-\).
I have no axe to grind with Dave (although I've been trying hard to think who he is... but I meet a lot of people to do with caving in the course of a year and the name on its own isn't enough to assist!
). The only Dave I know who has an idiosyncratic turn of phrase and who knows me and Andy S is Dave M (with the deep hole!); in which case all I can say is that he's a really nice, but serious, chap who doesn't deserve to be flamed even though he is asking in depth questions which might at first glance appear to be slightly OTT.