Raffles - first may I take this opportunity to say how useful I have found many of your past posts. You are very helpful when people ask questions and a real credit to this forum.
Lets say one made 18 x £5 donations = £90. You would receive 40,500 PC points - So thats enough points for one night at the IC Opera in Paris - quite a bargain. As Raffles mentions, with the 18% additional gift aid, the effective cost would be only £74.
Sounds like this one could be open to over zealous donations to grab points - time will tell how long it lasts.
Excellent find