Three Cardiff-based charities will get a slice of the pie this month after nextbikers across the UK raised almost £900 through the bike share firm’s annual charity campaign. In the run up to Christmas, nextbike halved the price of its annual subscription to just £30. And for every subscription sold, £15 was then donated to the charity of the customer’s choice. The organisations – bereavement charity 2 Wish Upon a Star, animal rescue centre ARC and cancer support charity Maggie’s…