Most earnings announcements and ensuing analyst calls are spent discussing all the money — or lack of it — the host company made during the previous quarter. Not so at Amazon on Thursday (May 1). It spent most of its first-quarter earnings call talking less about the dollars it made and more about how it intends to keep winning the battle for the consumer’s trust. It sounded its traditional theme of the customer experience early and often. So far, anyway, that customer is proving to be fairly resilient. By ...