One row per price seen: list, promotional and regional prices are separate rows, and channels that disagree sit side by side. Nothing is averaged or overwritten.
Real User Monitoring measures browser and mobile sessions from the end user's side and is priced per thousand sessions in two SKUs Datadog sells together: RUM Measure on full traffic, and RUM Investigate on the filtered sessions a customer chooses to retain for 30 days.[1] Session Replay, the video-like playback of a retained session, is billed separately per thousand replay sessions.[1] Headline rates assume an annual commitment; the rates billed by usage without a commitment are the higher on-demand rates, and fees are payable in US dollars.[1][2]