I used this facility twice, the first time I had paid for parking and had completed the walk when I spotted it, so made use of the facilities and was talking to another MOHO owner who said it was funded by the parking fees, the second time I used it I was passing so pulled up outside, as it is only £3 to park I went to get a ticket but it was jammed and not accepting coins, as it happened there was a traffic warden doing the rounds so went and told him the machine was jammed. He said if your just going to be 10 minutes don't bother paying, but I insisted as the service facilities were worth £3 and thanked him for suppling them, which took him by surprise. He said they are installing a second one at Broadford, and I did suggest a donations box.
Also, when we went to Carbost to the Talisker Distillery we stopped on the Slipway at Portnalong, which allows 5 vans and has a donations box and a tap (the notice informs us that they plan to improve the facilities for motorhomes), as there was a pub within walking distance we stopped here twice and dropped a fiver in the box both times, but to be honest, sadly I didn't see other users go anywhere near the box. On the way back out past Carbost there is a little unmanned camp site with a basic CDP so took the opportunity to empty my cassette, again no donation box so just dropped £2 through the letterbox.