I wonder how many people you will be able to watch doing the rap though. I really can't picture most climbers of Conifer Crack choosing to approach that set-up and bring a less experienced partner or party with them, then doing two raps, instead of walking off.
I'm going to guess that an individual has put the set-up in because they do the route often with beginners or clients. Saves them dealing with their inexperienced crew getting down the back way and gives them an abseil as well to supplement their adventure. Just a guess.