As sombody who was involved with local supporters branches and the Motherwell supporters association many years ago, ( Yes i dealt with Martin Rose) i found that the people who are active in these various committees are judged on their actions and what they achieve for their members. The same is true now with the supporters trust and now the Well society.
Personally i never signed up to the WS as i was not convinced of its merits at the time, but i may join this year. The people who are active in the WS give their time and effort, and if they are seen to be doing a good job in representing the fans views and interests, then this may encourage others to sign up, ie will the fans views be heard and considered by the board when making any decisions relevant to them.
The WS and the people who have been elected to manage it on behalf of the members will be judged on their actions and achievements in getting the fans views heard and respected, so if they do this well then i would not grudge any of them a jolly to Nyon.
However if the general concensus from the members is that the WS is a bit of a talking shop, offering no real benefits, whether financial or influence on club policy regarding fans issues etc then its elected officials will be viewed differently. In this scenario the WS chairman going off on a jolly to Nyon may be viewed as a bit too cosy and taking the benefits for doing nothing .
But it is down to the WS members to stand up and be counted, only they have the power to remove officials from office if they consider them to be failing in their obligations.