I am not surprised that the account has been blocked.
To earn so big amount from faucet in one month it have to be at least 100k visits per day. I'm sure that most of this entrance have been coming from proxy and AdSense don't like that.Anyway impressive result!!! Well done marketing!
I run Adsense ads from that account for more than 1 year, before being banned ...
I had 13 websites with Adsense when they ban me (3 of these were faucets)
I also had few faucets in past and i run them also around one year with AdSense account. But i had around 10000 - 20000 visits per day. I tried to defend myself against bots as I could, but even that 20k was enough to get ban from AdSense.
Hard times ..