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,

Do you really think .so is on high demain like other extension, such as .net .info .mobile and others, if it is then I believe the owner of the domain name won't wast any time in purchasing it back.