I have spoken with TinyCo regarding the Buy One Get One Free quest to find out about why we had a timer:
TinyCo told me that the quest should have disappeared, and if it hasn’t, any player still seeing the quest – to contact them via the in game function or email, as it may mean that there is a small bug!
Are you still seeing the Buy One Get One Free task? Message TinyCo and say goodbye to the quest!