What's the point in it? It just limits the amount of time you can play the game, which is obviously bad.
I've seen this in other games, which is pretty much the reason those games die out due to people getting frustrated with only being to play for 1 hour a day; it is by far the most counter-productive mechanic that you could possibly put into an MMO.
No. Stop playing if you can't buy energy with crowns or IRL cash like normal people.