Yes, and I am not matching any of those reasons. They blocked my account because the total value of my holdings was over $1000 (didn't you read the text of the email on the first post?), that's what they said, could you point me to a place on their documentation or help pages in which they say they would do so?, now they ask for extra enhanced verification (contradiction to what you can see on your account after doing the basic verification, that would allow you to trade and withdraw up to 3BTC per day).
And btw I have been over $1000 before and nothing happened, so this is not an automatic thing happening to everyone, is a selective measure happening when they see it fit. Maybe they were in need of some of my coins for whatever pike of demand they were having, so the system chose my account to be blocked.

I have submitted the damn selfie (even if i shouldn't have, because as I said, I was never warned about this, and they are basically forcing me to do it by holding MY money). Now let's see how long this takes to be solved.

You can look at it whatever way you want. It is not cool. I also were happy with Bittrex until now. I actually would like them to reconsider this kind of measures, implement a better system, and then i'll happily keep using it. But not with this kid of surprises that take your sleep way without you having done anything wrong.

EDIT: Another comment on this: I have of course done a search on Google and went through Twitter comments on Bittrex account... I am not the only one suffering with this issue. You can do a search by "bittrex account_disabled" and you'll find a few of them, on this site. Often with many answer like "Hey for me it works fine!"...