Olathe, Kan. -- Ruf Strategic Solutions, a provider of database marketing services for businesses, has been acquired from SPS Payment Systems in a management buyout. Dallas-based SPS had owned the company since 1995. Terms of the buyout were not disclosed. The ownership team consists of four brothers: Kurtis Ruf, Brian Ruf, Eric Ruf and Jacob Ruf II. They are sons of Jacob Ruf, who founded the company 23 years ago.