I remember when you were able to tell right away that which websites were made with WordPress, now days this platform has become more flexible and customizable than some html temples. The learning curve is not that steep either, making wordpress very popular with blogs and ecommerce. I would say that since they need to keep up to date with whatever plugin they use, they need to have someone in charge of the maintenance of the page. I hope Big Bite and Amnesty International develop a long relationship.