Heads up! Your feedback helped us identify 3 areas of our Community Guidelines where we can clarify policies & strengthen enforcement:
Custom thumbs
External links
Pranks & challenges
Read how enforcement will ramp up over the next few months → https://goo.gl/9FtUjc
So you are going to “enforce” thumbnails, but I highly doubt that this will happen and we will see more thumbnails that lead to clicks and offer nothing