...am I the only one who knows the word ROGAINE as the brand name of a shampoo sold to men who have started to lose their hair...

No you're not, belM, which is why I specifically excluded it in the last sentence of my first post. I haven't seen the product here in Oz. Either my (Australian) friends Rod, Gail and Neil Phillips who invented the sport Rogaining and named it after themselves were blissfully unaware of the hair product, or perhaps it hit the market after the sport appeared (c 1975). [Or it's their sick humour.] The sport spread throughout Australia, and thence to USA, Canada, Europe and NZ, not necessarily in that order. Four World Championships have been held, in Australia (twice), USA and NZ, with the 5th to be held in the Czech Republic in 2002.

In my long explanatory post, I didn't mention that there are now several interesting variations on the classic country rogaine-on-foot, namely:

Snogaine
Metrogaine
Cyclogaine (with a handicap category for fish)