I average 10-12 gb per month and noticed that I was throttled to around 500 Kbps after 5 gb.
This month at 3.5 gb, I was throttled.
The work around still works but what a headache
Maybe the whole using over 10GB is an issue. Why so much? If work doesn't offer Wi-Fi, it's probably because your job position doesn't require you to be on the net. Hence, stop browsing the net and do your work. Harsh, but I don't know why you complain on this point.