Managers of business-to-business telemarketing services are finding it harder than ever to realize positive ROIs. While those with business-to-consumer offerings have had recourse to outsourcing to far-shore providers for cost savings, B2B marketers have had mixed results- at best- with that strategy. For most companies with complex B2B offerings, it is not even a viable option. Unless you have a very high allowable cost per lead acquisition, the days of…