"Chance to win the prize" ... so this is a contest ? I thought we just needed to join the group to have the reward (as in Valentine's event : we just had to like the page to have a Josephine fan) ....
This is from the facebook group
" We will soon run a contest here in our Facebook Group where you will have the chance to win it
So yes, it seems it will be a contest and only a select few will be able to get that set completed.