You probably already know about this, but I didn't. No big deal,but...FWIW...
I have an autopay bill for about $100/mo. (from my credit card)
The bill is for the 15th of the month.
Two days after the 15th, I get an Email saying the bill is due the 9th of the next month.
The email also says, "click here to see the bill".
When the bill shows up, there is a "click me" to pay the bill now.
My instinct has been to click to pay right away, not thinking that the bill would be paid automatically and charged to me on March 9... anyway.
So... no big deal, but the service is used by almost 170 million subscribers. If even a small percentage of those customers pay their accounts three weeks early... think of how much that means to the company in extra earnings.