According to Maxis Forum the replied as below:
"quota capping be implemented in the future, the speed will be throttled down to 512kbps. Referring to the terms and conditions Maxis reserves the right from time to time to make any changes deemed necessary and or required either to its services. However, user will be notified of such changes via Maxis portal. In regards to 'Maxis Hotspot' service, we wish to clarify that this feature is yet to be implemented in the near future but is in the planning for future enhancement of the said service."

https://forum.maxis.com.my/forum_topic.asp?...000&whichpage=2