Your words are not clear.
You got that right, but I understood his question perfectly.
OP, if you can get what you need from an exchange other than Yobit, do it. There have been so many complaints about them on this forum alone that I wouldn't trade any significant amount there. I'd only use them if they're selling a coin you can't get somewhere else--and if you do trade on Yobit, don't leave your funds on there, not even overnight. Withdraw everything to your own wallet once you're done trading.
I've used them and have had no issues, but I don't advise sticking with them as a primary exchange.
There are many accusations where they have their wallets offline for specific coins due to which many users have lost their funds. Not sure if they ever get settled.
Yep, I've seen the same accusations. My guess is that such claims were true but eventually got resolved. Yobit never seems in a rush to get wallets back up and running, at least not like when Binance does the same thing.