Why submission recharges by 10 units per day instead of 1 per day?
Because Niantic are super generous… they love us all equally. Enjoy the boost… plus, if you haven’t read the link that SlimboyFat71 posted, you get a max of 300 (give or take 30) out of the kindness of their hearts. However, if you don’t like Niantic’s generousity, I wonder if they can sort something out for you? 
Oh…nice. I love submitting things! Can’t wait to be able to modify wayspots by using the site 