MrBeast Closed His Mouth!

MrBeast tweeted that he is closing his mouth in all his video's thumbnails without declaring the reason behind it.
But recently, he shared another tweet with some screenshot that proves that his closed-mouth thumbnails are grabbing more viewers' attention than open-mouth thumbnails.
As you can see they are highlighted as Winner.
Besides, Mr. Beast was able to do this experiment with YouTube's new feature which is called A/B Thumbnails Tester.
Hit the subscriber button if you want to keep your mouth open...
That's why.....

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