I requote, just to be sure nobody gets that wrong:
5/27/2013
Dear customers, we are currently suspending bitcoin processing.
https://www.okpay.com/en/company/news/bitcoin-okpay-terms-of-use.html
It's not the first time they done this, but the question remains: what is the reason and how is it linked to Gox?
My guess is they are waiting to see what happens with the dwolla account. They are in a similar situation, not necessarily affected themselves but the exchanges would be.
It's a precaution, for them it's better to lose a little business for the time than have to risk a mass of disgruntled consumers with frozen funds.