While doing a Scenario if you are the only one left in the party when the last stage is completed your guild will Receive the Guild Scenario completed weekly requirement this can be repeated up to 15 times . if your a hunter and can easily solo Theramore like me and have a bank guild you could make 250g each run up to 15 times not to mention guild exp. I am sure someone will come up with a clever use for this knowing that you can now do it ^_^