Well really they do quit sometimes if its time for them to retire sometimes they come back into WWE and just come for revenge or as a special guest host for the day.I hope this helped.
To put it simply. Its the same exact thing as AIM(AOL Instant Messanger) except you can use it while playing games.
IF you play alot of games GET IT!! U CAN JOIN CLANS AND MEET NEW PEOPLE THAT PLAY...
You can go to your account settings and deactivate your account, you can reactivate it in the future if you wish to rejoin Facebook and it will restore all of your friends and photos.