In my opinion they are just a company seeking an opportunity to make money alongside their partners eg insurance companies.
Assuming you have obtained (and paid) for a Permission for Commercial Operations (PfCO) from the CAA in the UK, your details can be confirmed by any client by simply visiting the CAA website. No cost to them, no cost to us. That's it. And it doesn't come more official than the CAA, I wouldn't have thought. The danger for Commercial 'drone' pilots is when clients expect to see membership of such an organisation when it fact in reality, right now, it makes no difference.
Unless there are additional benefits that come with joining such registers, like marketing which we would all like, we need to start educating current and potential clients to this fact before we are forced to pay unnecessary charges just to 'look the part' and join those that thought this was a good idea. Very sad......
