Nice try alia.
At first I did not think you were 19, but I am leaning that way now.
In the US the highway speed limits are 45mph to 70mph. 45-70 means just that, you can't go 100mph, you violate the rule.
Technically, if you post more than 100 times in a month you have breached the terms. Your contract specifically states it, it does not state at least 30, it states 30-100, a clear, specific range outside of which you violate terms.
Pay him back.
Thanks for proving my point!
In your scenario,
speeding is the danger. In my scenario,
underposting is the danger.

This is the point that I take away my teenagers keyboard and send him to his room.
Not quite pertinent, but if you have a 15 year old brother, and you share wi-fi, I assume you live at home with mom and dad?