It’s absolutely ridiculous. I cap out in just 3 hours of playing. Now I can’t play again until 5am my time because if I play before that I’ll miss out on the XP for the monthly challenge. I can’t believe 343i didn’t learn from Reach that a daily limit is a very stupid idea.
You CAN play. You just don’t get EXP. 
I really dont understand the whole reason for a daily xp limit? Rank in this game does not give you anything except extra armor so what is the purpose of limiting it?
> You CAN play. You just don’t get EXP.
It would make the monthly challenge feel like a waste of time though.