Anytime. That is not correct. It increases 14 per day, not 1 per day and showing up when it is 14 days. You should understand the difference between saying "I get $3000 per month" and "I get $100 per day" even though the amount you get monthly in both cases is same.
We cant really prove if I am wrong or you are! Only theymos knows 
Anyway, Nice example
I would not really say it increases 1 per day. It does not increase until the next period. Which is 14 days, but it's calculated then it's not increasing daily.
And for example if you posted 14 post's in one day you could get the whole activity. You don't have to spread them out and get at least one per day.
And for example if you posted 14 post's in one day you could get the whole activity. You don't have to spread them out and get at least one per day.
I have something to explain but I simply cant explain it here.. I don't know how to explain!
If you post daily atleast 1 post, activity increases in the database but isn't shown here!
If you don't post daily and post 2 activity tomorrow that day 2 activity will be recorded in the database! Hope you understand!
1) Were are you getting assumption that you get 1 activity per day? This would be false as far as I know.
2) Im not sure you understand my post. I was trying to explain you could post all 14 post's in one day and get the activity for that period. You DO NOT have to post daily, just within that period.