You can send voicemails yes but when has that ever cost money elsewhere?
It doesn't cost money on Xbox Live either.
It's a tough argument.
On the one hand, you can say "I don't want to pay just to play. Everything else is free."
But Xbox Live is an outstanding service. That marketplace is the gateway to your hard drive, which allows you to download movies, music, some pictures, and game demos absolutely free.
Then there's premium versions of the above content, full versions of arcade games, and other things.
Then there's stuff like trueskill matchmaking, spectator mode, and gamercards which you ignore. These are just some of the fantastic offerings.
So should you be charged for these things? Well, yeah, but you're really not. You're charged for playing online. In exchange, MS has made sure that darn near 100% of all Xbox 360 games are playable online. Is this fair? That's up to you. But MS has put up a service that is tough to beat.
With the number of free Live subscription giveaways with games last generation, I'd say it's possible to spend a great deal of time not paying for this service.
How long do you usually play a game? For me, it's just a few months, even with long RPG's. I don't like to get backlogged. This means that I could realistically buy an Xbox Live game, get a free subscription, and be finished playing the game by the time the free subscription is up. At that point, I could decide whether I want to keep paying.
And guess what? Xbox Live also offers incredible subscription plans. 1 month, 3 months, 6 months, a year. Whatever you think it's worth for the time being. It's flexible.
People like to paint Xbox Live as some money pit but I haven't spent more than 6.95 since I received my Xbox Live subscription. For that I paid for an Xbox Live arcade game and some great online multiplayer. Worth it? Absolutely.
And here's a secret. All scoreboard competition is ABSOLUTELY FREE. That means you can outscore people around the world on Geometry Wars or whatever without paying for the service.
There are so many ways to get into Live that don't involve money, and yet the service itself is so well-developed that it's hard for me to imagine someone saying it's not worth it.