I've sended RDD coins on Yobit.
I got '85 CONFIRMATIONS' for this transaction and got no coins on my Yobit account.

Support replied to created ticket with:
'Wallet  is on maintenance.
The solution to this cryptocurrency will take some time, need to update the wallet.'


THERE IS NO WARNING message about wallet maintenance.

So be careful with RDD coin deposit on Yobit now.

UPDATE:
Looks like after my request they added warning message, but didn't disabled deposit button.
So be careful - don't deposit till they fix this issues, or don't deposit your coins on this exchange ever.