It's paid for by Divine. Oxfam will get a donation when people buy the chocolate in their store (rather than at supermakets etc). If you like this chocolate, it's a good promo to let you know an extra way to raise money for Oxfam.
Refrain from hitting the cold button and read the FAQ That is why they are doing it.... I am sure the Oxfam's CEO getting Millions in his pocket than to those who need it most, is more a disappointment than this promotion by Divine!!!
Disgraceful -as it is a charity shop - rather they asked for donations rather than wasting shop time on something like this COLD