They have announced that they were terminating their service and surely this includes taking all the funds on their wallet including yours.
Since you say its empty, have you check the latest transaction history of the wallet if this includes a lot of addressese including your address?
However, I would say that Rahakott should still be made accountable over those people who lost funds, those who were not able to make withdrawals before their deadline.
As per the post of Jawhead999, whose link is provided by OmegaStarScream above, the announcement was done less than a couple of months before the withdrawals will finally be closed. This appears to me questionable, a seemingly sly decision that is highly disadvantageous to their former users.
Why are they allowing withdrawals for a very limited number of days only? What if someone is offline for almost 2 months? What if someone hasn't checked the wallet's official announcements for quite a while? Will Rahakott just run away with their funds?