In addition to alienating me from all my friends and family, it has successfully bound me to a de facto vow of celebacy as my odds of meeting women are basically nil until I lay off the TW brand of cyber-crack.
Apart from that, it has helped me establish a decent savings: Now that I have better things to do at home, it saves me from having to pay for drinks at the pub when I can simply pick up beer and wine from the grocer for notably cheaper. Also, since I no longer go out or try to impress women, it has saved me money on laundry, toothpaste, soap, deoderant, and my water utility as TW is perfectly playable even while flies and cockroaches are crawling all about you.
All in all, I'd say TW has been very good for me. It's established me in a society of like-minded antisocial sloths that understand that it's more important to excercise social abilities behind the guise of clever screen name and witty profile than to demonstrate your smarts to anyone that might put you on a payroll, sleep with you, or connect with you about any of those so-called "important" things in life.