Overview
The scammer employs urgency to increase the likelihood that the victim will take action. Common urgency tactics include "act now", "limited time", threats of account closure or other negative outcomes, and so on.
Sometimes paired with Scarcity to increase the victim's "FOMO" (fear of missing out).
Related Articles
Urgency Theory in the context of broader emotion theories: a conceptual review, Frontiers in Psychology
How Fraudsters Build Scams and Use Urgency to Trick You, Kindred Credit Union