A rain delay empties a ground faster than a poor match does. Keeping a crowd in place through one is a defined operational task with known techniques.
Information beats reassurance
Crowds tolerate delay and do not tolerate uncertainty. Grounds that announce a concrete inspection time retain more people than those that promise an imminent restart.
The announcement has to be specific and it has to be kept. A missed inspection time costs more credibility than a longer interval honestly stated.
Where the outlook is genuinely bad, saying so early is better business. Spectators who leave informed return for a future match; those who feel misled do not.
The screen becomes the event
Large screens carry radar, highlights and interviews during delays. That programming exists to give people a reason to stay in a seat rather than move to a concourse.
Grounds that run genuine content rather than sponsor loops hold crowds noticeably better. The distinction is obvious to spectators within a few minutes.
Some venues bring cameras onto the covers themselves, turning the ground crew's work into the broadcast. The crowd watches it because it is the only live action available.
Concessions extend rather than close
A delay is a commercial opportunity, and the operational instinct to reduce staffing during it is usually wrong. Demand rises when play stops.
Grounds accordingly hold service points open and sometimes open additional ones. The crowd's alternative to buying something is leaving.
The same logic applies to restrooms and seating areas. Anything closed during a delay is a push toward the exit.
Refund policy shapes behavior
Where refunds depend on a minimum amount of play, spectators do the arithmetic themselves and their behavior changes at the threshold.
Grounds publish those terms prominently for the same reason. A crowd that knows the rule makes its own decision and does not crowd a service desk.
American venues hosting cricket import their own rain-check conventions from baseball, which can differ from the competition's terms. Reconciling the two on the day is a recurring source of confusion.
The restart is its own operation
Once play is called, the crowd has to be back in place quickly. Announcements typically go out several minutes before the restart specifically to move people from concourses.
Umpires and groundskeepers coordinate the timing so that the announcement is reliable. A restart announced and then delayed undoes the retention work of the previous hour.
Grounds that manage this well end a delayed day with a fuller stand than they started it. That is the actual measure of whether the delay was handled.

