You bounce 19% of your traffic but some other 30% might accidentally agree to the notifications and now you can bump your traffic every day by sending them. Tho

You bounce 19% of your traffic but some other 30% might accidentally agree to the notifications and now you can bump your traffic every day by sending them. Those 19% are probably useless people with adblockers that never give their email or click any ads so you lose nothing anyway. Also, you can send ads using notifications and earn money.