Sorry for you, unfortunately Mweb includes Steam and Origin updates as part of the download allowance. And yes it will push alot of people over the throttle threshold. It is the only reason I have cancelled with Mweb! For those that do not yet under stand, Mweb's throttling has nothing to do with the torrent junkies and everything to do with simpily reducing all users downloads on their network.
They made a big deal about the so-called 3% and people downloading 1.5TBs but they are in fact targeting anyone who downloads more than 50gb per month. Mwebguy will not dispute this fact because he knows as well as I do 50 + 50 equals throttle on a 1mbps account. This is not to say you cannot download more and remain unthrottled it is simpily the safe number that ensures you will never will be throttled. If you go on their facebook site you will see it is the numbers being given by the Telkom techies to ensure no throttling.