This will be my first year on instaGC but I have heard from others that use it that they always look forward to the holiday program they run. The program kicks off from October 1st and runs through the end of December.
For those that have already signed and use instaGC you can access the holiday bonus page directly here https://www.instagc.com/holiday-bonus/
It says you can apply the bonus points as you like but I might let mine build up just a bit before doing so. I changed up my goal recently for a $25 Walmart giftcard since I'm trying out their shippingpass program. Though once it gets closer to the holidays I will be gearing up for Amazon ones.
Hopefully this little holiday perk will help to reach goals :)