The question of value and fairness will be answered if / when someone replies to either of the posts. If no-one can see the value the trade will pass the deadline and the OP will lose out. I guess there's nothing to stop the interested party to offer something else in return i.e. relevant number of points to make good the original booking.

I guess some people will have many miles to burn and fancy a jaunt to Vienna, whether they see this post is another thing...

Divorce this from the fact that I have been the beneficiary of a lot of sterling guidance from some members of FT and it's all been in kind. Likewise I've given some people the benefit of my experience (and lounge access) and wouldn't dream of taking anything in return.

Bad form if done for personal gain but you always have the option to ignore the offending posts (a bit of self-censorship if you will).