Minno, thanks - though I didn't help much (at all!)
You mentioned the 'etiquette' on the Forum, the variations in threads. It's really just convention that the Guardian and Observer threads get hints rather than answers. That seems to work well, seems to suit most people - but if someone asked for an answer, there's no reason at all not to give it! And different solvers, helpers, have their own codes of conduct, ways of doing things - for example, some people won't give answers to prize puzzles. The only hard and fast Forum rule is that answers aren't given for the Listener puzzle. This is partly to do with that puzzle's status, history etc - and also because it wasn't a success when the Forum did feature answers.