They're well past their warranty and even if they weren't I was done playing that game with them after my 3rd set of shocks and bumps still leaked. I am happy to say that I will never deal with FOA ever again. I would run no bumps or buy new bumps before I dealt with them again.
In all fairness, I don't think this is a result of defective product. I think it is defective design. It would happen again and again because the plastic is just formed into a small groove on the pad and getting nailed by the weight of the buggy repeatedly just deforms them and causes them to fall out quickly. New pads would just do it again.