This is the second time an email provider has shutdown, first it was lavabit now myopera... I learned my lesson, I bought my own domain name and I'm going to use a personal VPS so companies can no longer do this to me. I learned, pretty much Opera has made me turn away from them, and ruined their reputation. I will never suggest Opera or anything ran by them again to friends or relatives.
I had important accounts assigned to it such as PSN, steam, and couple of others which took me a phone call for one service which was assigned to that email account. Yes, that was my fault for trusting a company like Opera which I thought was a better alternative to Google since of the newer surveillance information. Plus, I didn't like Google scanning my emails to personalize ads.
The TOS, yes, I am aware. They could have done better, and I didn't check my email daily and sometimes I used thunderbird without checking the first page and I never received a warning. Want to know how I found out what emails I had? I had to read my browsing history. After I heard about facebook trying to acquire it, and then them shutting down my email without me noticing (yeah probably my fault, they could have done better) I decided to switch to an open source browser like firefox.