Has anyone tried to predict when this experiment will end?

I was thinking that someone with more mathematical acumen than I should be able to figure out the average time the button is pressed, how that time is changing, and then multiply that by the number of subscribers, and how that number is changing, and get a rough idea about how long until the timer hits zero. After all, even if everyone towards the end is only hitting the button when it is 1 second from expiring, we should be able to figure out how long it will take before accounts run out.

Or, are there any guesses out there? Anyone want to get a pool going here for the closest guesser?