Yobit seems working for me just ok, but still signatum on more exchanges would be great. Those scam accusation are somewhat worrying me.
If you have a look through the post history of those making the accusations, you will not be worried.
They are perpetual FUDers, with little, to zero credibility on Bitcoin Talk.

Pro-tip, when invited to look through the post history or to google a forum user, please do so as it is frequently found that the lying scammer sock-puppet accounts who try to so blithely dismiss those who expose their fraud, rely on people simply accepting their word and not actually checking for themselves.
When they do check, however, they can quickly see that the person making the claim is clearly lying. They then need to ask themselves why that person was so compelled to lie.
Seriously If anyone decided to take a pro-tip from you, the entire Crypto-world would cease to exist overnight. As I mentioned, absolutely zero credibility.
Certainly puts into perspective the reasoning behind your name, and the idiosyncratic model of the Devil from the Bible. Devil seeks to destroy the world, CryptoDevil seeks to destroy the Crypto-World.