I hope I'm not violating this board's terms by drawing attention to Chiltern
No, you aren't. "This forum is provided by a customer of First Great Western, and the views expressed are those of the individual posters concerned." There are posting rules referred to as well - in essence about keeping it legal, honest and friendly, and not spamming.
Have I missed something? Or is the FGW▸ fare a rip-off, designed to deter custom?
In principle, you could argue that every
TOC▸ that offers multiple ticket pricing (peak and off-peak fares) has a structure "designed to deter". How you share out responsibility for that design feature between
ATOC» , the TOC and the
DfT» is an interesting academic discussion; in reality it's a partnership between them all.
On top of that generality, there are some other interesting quirks in our ticket system - many are historic, or the effect of a pattern being applied across the board which makes some specific oddities and features. And, yes, there are cases where the fare is set to maximise revenue rather than passenger numbers more aggressively than in other cases. Competitions such as you have reported is one of the "free market" tools designed to provide a check on this practise being taken to extreme.