Corporate Internet service provider Linkage Online has bought a majority stake in Hong Kong Internet and Gateway Services, according to an IT Daily report. Founded five years ago, HKIGS is the SAR's oldest commercial ISP, but it has remained a small player due to its relatively high prices for dial-up services. Linkage, by contrast, has grown to become a top provider of corporate leased lines for Net access, a more lucrative business than dial-up consumer access. It was bought out by United States ISP PSINet earlier this year for a reported US$20 million. PSINet has bought about 10 other Asian firms in the past two months. In other news, China Internet Corp is joining a top US Internet ad agency, 24/7 Media, to sell banner ads and related technology. CIC will sell ads for 24/7 Media's global network of 85 other content Web sites, and vice versa. It also will market the company's Adfinity software, which lets advertisers change ads instantaneously to target Web surfers. 24/7 Media also will build an SAR data centre to support its operations next year.