Cafe.com is announcing today the sale of its Boonty casual games platform to Nexway for an undisclosed sum, in order to allow the company to completely focus on its Cafe.com social games site.

Mathieu and Roman Nouzareth, the founders of Boonty and Cafe.com, say all proceeds from the all-cash deal will be reinvested into Cafe.com.  At the time of sale, Boonty was profitable and was growing at the rate of 10% per month, the company says.

Cafe.com, launched in May 2008, now reaches over 5 million players per month. The site has focused on building a friendly social environment where more than 30 “highly addictive casual games” are wrapped inside a social networking experience. The company says more than 50% of its audience is female, and over 60% of its audience is over 26.

With its new focus, Cafe.com plans to continue developing both transactional and advertising revenue streams.

“From the beginning, Cafe.com’s business model has been based on micro-transactions and rich media advertising, a successful model started in Asia and now being adopted by other entertainment companies. In addition, Cafe.com is continuously adding new titles to its growing slate of web and social casual games,” Cafe.com CEO Roman Nazoureth said in a statement.