How are you measuring your pipeline influence with Digital Success?

I lead a digital success team and a new part of our focus is 'activation campaigns, where we're working to ensure our customers are activating all the features of their purchase, which in turn should create new opportunities for cross sell. We ran one campaign that produced some significant pipeline influence using a crude formula of looking at any upsell opportunity created by a contact in that campaign within a certain timeframe.

My question is: if you are measuring your influence and/or attribution to pipeline, how are you defining it? What does 'CS Influence' or 'CS attribution' for a digital success play look like for your org?