SnackTools points are the Snacktools currency and you can use them to pay for the premium features as an alternative to a membership. Points are required when you want to publish your work, the final step in SlideSnack. More precisely, you will need to pay if you wish to get a watermark-free embed without any limitation or if you want to download your slideshow.
You can buy 10 points (that’s how much the premium options cost you for 1 slideshow) or you can purchase points in bulk. The cost for 10 points is 19$ and they get cheaper if you purchase in bulk. SnackTools points never expire so you can use them on current and future projects without concern for an expiration date.