San Mateo, Calif.--Siebel Systems Inc. has pulled the plug on its Sales.com Web site as part of 10% streamlining at the industry-leading customer relationship management vendor. Sales.com was an Internet service which provided sales force automation services to companies. Its demise leaves independent Salesforce.com Inc., San Francisco. as the major player in Web SFA services. The move came despite Siebel's posting increased net income ($76.9 million versus $35.3 a year earlier) and revenues ($588.7 million, or 84% ahead of first-quarter 2000's $319.7 million) in the first quarter ended March 31. Siebel regularly cuts the lowest performing 5% of its employee base, but is doubling the cuts--about 800 employees total--this quarter.