Interesting. My experience of holdpools suggest that prolonged waiting times result in obvious frustration and uncertainty for the floater. It usually also results in the related company raising contact from time to time in order to enquire into your health, to provide an update on their position and to discuss your currency. Lack of currency generally leads to lack of interest.
Alternatively personnel change or recruitment policy shiftings can lead to you being caught out in the cold. A lot has happened in a few years. It seems little may have happened with you? I'd maybe give them a ring and get the lowdown.