Are you sure youre pointing at the same blockchain as the Yobit source? Ill say one thing about Yobit and thats theyre pretty crap at updating source. Since SOCC was forked and then attacked Im no longer sure which source theyll have compiled.
On Feb 13th the wallet on YObit was online and I xfered out some SocialCoin to my wallet to test if they were on the right chain.
The transfer worked, that is one of the tests I perform before I dedicate any time or effort into a coin. If the exchange is not on the right chain I won't bother.
Since the time of my test transaction, the wallet went into maintenance, but I see no reason or issues on the blockchian to cause this.
Usually, Yobit auto-drops wallets for stale blockchains to maintenance mode. This happened a lot in the beginning of SOCC when there wasn't enough hash power to push the block forward. But, if prohashing is on the correct blockchain then it looks like there's plenty of activity even today.
So I'm guessing it's something on yobit side.