What role did each "engagement" play? Which had more sales impact? Most importantly, and the reason we study marketing response, how should we separate marketing activities that are nice-to-haves versus those we need-to-have for next year's budget?
The real questions wrestled by business marketers when building budgets can be boiled down to priority.
It has been said in B-to-B land that Social media is social, more for customer service and not to be judged for lead generating. In that sense it takes on a more foundational role in marketing.
The fact is, for better or worse, Social opens up one more channel from which to support customers.
Instead of asking how to meaningfully count B2B Social interactions or impressions, a company would be advised to carefully study its customer base to determine its current perceptions and likely use of Social before rolling out another communications channel.