NEW YORK (TheStreet) -- Facebook (FB) - Get Report claims to be a social network, but it's increasingly a gaming network. That's where the money is.

Gaming takes time, so the market is something of a zero-sum game. Gaming is a bit like music in that tastes differ. My daughter, for instance, is a social gamer, while my son is into console strategy games. The time they take from games is mostly taken from TV. I have the set to myself these days.

The big news in gaming over the last few years has been the rise of social gaming, which started with games like Farmville from

Zynga

(ZNGA) - Get Report

, which my daughter played for months. Notice I wrote "played." In social gaming, trends rise and fall like pop songs.

Social games don't require much bandwidth and they are relatively simple. By seizing this ground, Facebook has become the dominant gaming platform.

During a speech at this week's GameDev Conference in San Francisco this week Sean Ryan, the Facebook head of game partnerships who came over from

News Corp.

(NWS) - Get Report

in 2011, delivered some big numbers on the success of this strategy.

Also see: Apple Just Released Another 'Cheap iPhone' >>

There are now 250 million gaming users on Facebook, the company paid $2 billion to developers over the last year, and over 100 developers took home over $1 million of that money, as reported by WebMediaBrand's site

Inside Facebook.

Facebook's big news at the conference was that it's

ready to pay developers in local currency

.

Ryan acknowledged that Facebook's niche is in casual games, like Farmville. The latest in this line is Candy Crush Saga from

King.com, of London, England.

But by being the home of such games Facebook is at the center of a $3 billion business, he said.

WebMediaBrand's

Appdata

site tracks Facebook game usage. Its numbers are revealing.

The

top developers

are mainly the names you know including Zynga ,

Microsoft

(MSFT) - Get Report

and

Yahoo!

(YHOO)

along with some new European-based game makers such as King.com.

Ryan wants to grow Facebook with what he calls "core" games, which are deeper, more similar to console games, adding that a number of such titles will come out on Facebook soon.

But to a panel of leading-edge game developers covered by

Thomas Claburn of Information Week

, Facebook is fading and developers are fleeing its toxic "get rich quick" mentality. Facebook's days as the social gaming frontier are over, according to these developers, and the big growth will come elsewhere.

You can call that

whinging

, but history shows investors need to listen closely. It's not just the games and the game companies that change quickly but the gaming platforms.

Just 15 years ago David Sheff wrote in

"Game Over"

about how

Nintendo

had taken over the market and would dominate for years.Nintendo has since risen and fallen a number of times, and currently its Wii U game console is the industry's "disaster of the year," as even

the WiiUDaily admits.

Nintendo was eclipsed by the

Sony

(SNE) - Get Report

PlayStation, which was eclipsed in the U.S. by the Microsoft Xbox.

Microsoft itself built a big market in PC games that played like console games, and the leader in that business is

Valve Software

, whose Steam platform manages distribution but is now threatened by Microsoft's own Appstore, which wants to emulate

Apple

(AAPL) - Get Report

and take over that end of the business. (Thus Valve is building its own console, the Steam Box.)

Also see: BlackBerry: The End Game >>

What Facebook is trying to do is climb up the stack of complexity, from the low-end casual and social games played by my daughter to the high-end console strategy games played by my son. All I can say is if it can get those two together it will be a first. And, like a family dinner, it won't last.

At the time of publication, the author was long YHOO, NWS and AAPL.

Follow @DanaBlankenhorn

This article is commentary by an independent contributor, separate from TheStreet's regular news coverage.