Yea, I KNEW about it since the beginning of the year but never knew that they were actually implementing it.
Also:
"Although the 250 gigabyte cap is now specified, users who exceed that amount will not have their access switched off immediately, nor will they be charged for excessive use. Instead, the customers may be contacted by Comcast and notified of the cap. The company did not say how 250 gigabytes was selected."
Before, plans were to automatically charge $1 per GB over the limit but apparently, that bullshit didn't get implemented.