Today I checked in for my upcoming Check & Go flight and I refreshed the checked luggage rules. They
have been changed.
As of February 1st, 2015, SEN/HON/*G travelling in Check & Go do not receive a free piece of luggage with their fare. I am not sure whether this 1/2/15 is the travelling date or the booking date.
Boo to SN.
EDIT: Booking class N has been added to SN's earning chart, and it earns 125 miles.