One scrape of a careers page tells you what's open. Two scrapes, a week apart, tell you what changed — and the change is where the value is. A role that appeared three days ago has a handful of applicants. The same role a month later has hundreds. If you are job hunting, that gap is most of the advantage you can actually control. If you are selling to companies, a role that just opened is a signal that a team is growing and has budget. Here's how to build it. The idea Run...