Actually the second to last boss awards myth tomes, for whatever stupid reason. I have cleared CT already, and I was a little confused when that happened. Also, its just the first day, people leaving early probably won't be an issue this early on.
There really are no junk mobs to kill your way through in CT, so there are essentially several boss fights, then you get loot after each one.
Honestly the OPs concern is valid considering the length of time the run takes, if some one gets something from the first or second drop it is not unreasonable to think some people with just drop.
The "One loot item per week" thing is just retarded for this reason and also because its not like its even the best gear in the game anyways. The amount of myth tomes awarded for the time spent isn't enough to make a person stay either.
