"Can consumers respond to having an experience with multiple companies?"
In some cases, yes, and in some cases, no. In the bank, credit card provider, insurance, consumer electronics manufacturer, airline, hotel, and rental car categories, they can pick up to two brands they’ve done business with most in the past 90 days. For retailers, they can pick up to four. For the other six industries, they are limited to one.
"What is the threshold to determine if the person is a customer? Interactions one time, over time? A recent experience?"
We don’t strictly require the person to be a customer. The person could be a prospect or a former customer. All we ask is that this person has done business with the company in the past 90 days.
"Why don't you track high tech?"
We do, actually. Two years ago, we added the consumer electronics manufacturer industry, which covers most of the latest high-tech gadgetry. We don’t include software in part because there are just so many types of software and so many brands. It would be hard to narrow them down to something manageable.