Well as for the APA? One should become a member of not based on the services supplied to the Physio. The launch of the Physiobase PI insurance product several years ago caused a bug shakeup in the APA as physios didn't need to remain members unless their needs were catered for. I am pleased to say that this has worked and in recent years the APA had made numerous strides to improve it's organisation and transparency.

That said the APA is becoming ever more controling on what a PT can and cannot call themself. You seem to have to pay money and do the right APA related courses and joing the official interest group to hang various signs on your door, e.g. Sports Physio. I think though if it all gets to much you can always stay state registered which alows you to practise and then call yourself whatever you like.

For the record I am still a member of the APA as it is a needed organisation for the work it does at a governmental level.