If this is true, then you should publish information about it with all the details and proofs, Let other people find out about scam, if any. I strongly advise you to be the most honest in your review, as other people will read it.
This is not the first time you hear about anything shady about the exchange, they have done the same in the past with fake shit coin volumes and spikes that is only listed in their exchange and this wont be their last and people still trade in those platforms even though there are many good exchanges in the market. Majority of the people in the market knows about their shady business practices and still they get customers

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There are lots of actions outside of this exchange and it is best not to get involved because there you will probably lose money very easily. I think if you only trade then there is no problem because deposit and withdraw money at Yobit is very fast. In fact, I have traded here and there are many cheap coins that you can invest or trade in spreads that can also help your profits.