Since a GPG calls for collective action, then, clearly, one's favourite program must be producing a GPG. This has given rise to "fuzziness" and "trendiness" [ [9] , page 2). The GPG 'tag' is at risk of being attached to anything of particular attraction and importance, to the point that, at the limit, anything promoting development could be considered a GPG. This is to be avoided, as overstretching the concept devalues the validity of the point that there really is a class of GPGs requiring public support or provision [10] .