I have couple of questions - In above post, there are two statements:
1. "your activity score only updates every two weeks"
2. "Activity is updated every hour."
Is the activity updated every hour or once every two weeks?
The activity will increase by 14 every two weeks. And after you make the first post in the new period, it will took up to 1 hour to see the new activity count in your profile.
The 2nd question I have is on how time is calculated.
time = number of two-week periods in which you've posted since your registration
I joined this forum roughly 10 days ago and by above formula, my time value should be 1 and Activity value should be 14. But my activity value is currently 28. Is the above formula changed since it was originally posted?
It is not calculated like this. It is based on periods.
For example for you, you joined in the previous period which ended Tuesday. That's mean you have posted on 2 periods, that's why you have 14 (activity) x 2 (2 periods) =28.
Now if we took the example of someone joining after Tuesday, he needs to wait 2 weeks before his activity increases.
May I know when my activity value will reach 30 to become Jr Member?
You need to wait until Tuesday - January 30, 2018
More informations about when periods start could be found here
https://docs.google.com/spreadsheets/d/12saLhlUoqIdairxzuSPu6EYGrt7FN2lOstO1yDjCEbA/htmlview?pli=1