just an advice ( If you are a the Owner of this domain ( zoosk.com ) you later found out that of recent somebody just register that brandname to another Extension e.g (zoosk.so) What will you do to get the Domain back and how much do you think you can offer to such person to transfer the Domain to you.
Also if you are the owner of this domain ( zoosk.so ) How much do you think you will sell it back to the main brand owner if the gr8t brand dating site name contact you by them self,

Your questions doesn't have fixed answers. Price tag is in the hands of the owner.