When most ad agencies launch something product-like, they have no plan in place on how to maintain it. They treat the launch of a product the same way they treat the launch of a new campaign and therefore have no teams set up to maintain it afterwards. And as soon as they get their press and maybe some awards, an ad agency will lose interest in the product and move on to the next thing. Also, as most of these products are paid for by marketing dollars, the budget is only to make it, not to continuously maintain it. When an agency loses the funding for a project, they will lose interest as well. To seriously create a product, the budget has to be planned years out, not just until launch.