One of most common automated media cron commands is rclone move every few minutes from your upload folder to destination folder or copy and then deleting 24h old files on sources. Without --no-traverse flag rclone will always access/check all files on destination (and source) and with big libraries that takes quite some time + amazon will mark you as a typical user accessing all files every few minutes.
From docs
However if you are copying a large number of files, escpecially if you are doing a copy where lots of the files haven’t changed and won’t need copying then you shouldn’t use --no-traverse.