I didn't know this until today, It's my first time hearing about this info that binance is using third parties and one of it is hacked last year. Sometimes the inside job is the one causing the major problem about security in companies. Binance is one of the few sites that I have submitted KYC, I somehow lost the trust I have today about Binance security. I should be more cautious about my information that I have submitted.

Это от суммы не зависит, могу и при выводе 10 баксов KYC затребовать, просто система настроена так, что если несколько подознърительных параметров скапливается то лочат счет на проверку. Чуть ниже xandry написал о таких параметрах, но их на самом деле больше, какие то больше имееют вес, другие меньше  при принятии решения о блокировки.

Посмотрев скрины, поражаюсь запросам тех.поддержки бинанс. Они думают, что люди хранят все входящие письма от биржи  , ясно, что никто не может знать даты регистрации на бинансе (я лично только год помню и примерное время года), то есть если на почте порядок и вычищены все старые автописьма, то от бинанса можно ждать проблем.
По поводу IP, у меня одно время при входе на биржу постоянно система требовала подтверждения IP по почте, хотя двухфакторная аутентификация была пройдена (IP тоже динамический), якобы с этого IP, ни разу не было входа. По почте все подтверждалось и заново проходилась авторизация с 2FA. Потом перестали запрашивать дополнительное подтверждение IP по почте, видимо до автоматики дошло, что IP динамик.

Unfortunately you will not get your coins back without sacrificing your privacy.

Centralized exchanges pull this crap all the time. Binance are particularly bad for it, but they certainly aren't the only exchange which does this. Advertise a no-KYC account, let users open an account without KYC, let users deposit coins without KYC, let users trade and pay fees without KYC, but as soon as you want to withdraw, suddenly your account is flagged for unspecified and undefined "suspicious activity". Your account is frozen, and you have to decide whether your give up your documents or give up your coins.

They never tell you why your account was flagged, and they also don't let new users what things not to do to avoid having their account flagged. Anything from logging in from a different IP (which is ridiculous since IPs change all the time, and you will have different IPs on different devices) to depositing or withdrawing from "suspicious" addresses (again, without them telling you what criteria they use to classify addresses) will result in your account being locked. Binance's advertised "2 BTC Unverified Account" seems to be a blatant lie at this point.

You can and should cause a scene about this on any platform you can, but you are highly unlikely to get your coins back I'm afraid. People need to stop giving business to scummy exchanges like this who hold their users to ransom.

Hello!
 
 
I ask you to transfer cryptocurrency funds from my account in the amount equivalent to 286.38087704 USDT to the address bnb136ns6lfw4zs5........... ​​from which the deposit was made.
 
I refuse to send you my personal data, a video with an identity document next to my face, because you have no legal basis to demand this, since the deposit was exclusively in cryptocurrency and I ask you to withdraw the withdrawal to the same wallet.
When I opened my account, there were not and now there are no rules of your exchange obliging me to do this. Moreover, when withdrawing cryptocurrency up to 2 BTC per day, you directly allow doing this without going through identification.
Also on my part there was no change of the mailbox address, passwords or 2fa-code.
What you write about the security of my account for “controlling the risk of withdrawals” fully fits into the procedure for returning to the deposit address bnb136.........................
 
I use VPN browser-based applications for logging in, so IP often changes and can be blacklisted. Therefore, your system considers actions suspicious? I do not violate anything using publicly available privacy protection tools.
 
Perhaps your system has determined my actions as suspicious, because on July 11 there was an attempt to enter and withdraw funds from another computer, so I provide the data for this event:
Authorization:
Date: 2020-07-11 09:34:10
IP: 185.180.222.154
Google Chrome Browser Version 78.0.3904.108 (Official Build), (64 bit), System: Windows 7 64-bit
Output: 2020-07-11 12:44:36 DASH 0.43: Xuyu6waGsk1VbQB............................
                                                                                                              
Regular authorizations:
 
Date: 2020-06-27 19:43:25
77.111.247.9
Opera browser Version: 66.0.3515.27 System: Windows 7 64-bit screen resolution 1024 x 768
date
2020-07-14 18:55:31
77.111.247.30
Opera browser Version: 66.0.3515.27 System: Windows 7 64-bit screen resolution 1024 x 768
 
 
 
 
Also, to confirm ownership of this account:
 
* Account registration date 2018-06-03 (see screen registration.png)

* IP when registering an IP account: 46: 166.143.101
 
and then login to your account (see registration1.png screen).
 
Accordingly, I want to maintain the confidentiality of my personal data, for this there are cryptocurrencies.
Therefore, let's not complicate life and act like worthy people, especially since you position yourself as the largest exchange.
If you incur any costs in connection with this fact, you can deduct them from the refund amount.
 
I had to leave negative reviews here: https://www.bestchange.com/binance-exchanger.html
If you don’t meet me, a corresponding topic will be created on the forums: bitcointalk.org; https://forum.bits.media/; https://cryptotalk.org/; https://forklog.com/tag/forum/ and other cryptocurrency platforms and review sites, as well as complaints to cryptocurrency communities, telegram channels, etc.
 
If you do as I ask, then negative reviews will change to positive, and this, in my opinion, is right!
 
I am attaching to this letter also screenshots from the personal account of the account as proof of ownership.

There is some abnormal activity with your withdrawals. We require you to verify your identity before we can re-enable your withdrawal functionality

Вы раньше на этот кошелёк уже выводили с Binance средства? IP-адрес меняли прежде, чем на бирже авторизоваться? У меня так же блокировка случилась однажды и эти параметры мне называли в числе причин по которым происходит автоматическая блокировка.

Тут несколько страниц назад у админа форума такая же ситуация была...
Ферифицированными не все конечно же торгуют... Но и такие случаи как твой тоже пока что единичные, хотя ситуация на самом деле подлая!

Возможность вывода средств с аккаунта была отключена из-за подозрительной активности. Пожалуйста, завершите проверку личности, чтобы восстановить функцию вывода средств.