In the checkout, Booking will tell you that similar hotels which match your criteria have already sold out, creating scarcity.
While waiting for Fitness+ to personalise your workout recommendations, the loading animation shows a stick figure running across the screen.
If you go to cancel an Uber, you'll see some clever wording. They'll anchor you to a reasonable waiting time (10 minutes) and trigger loss aversion (having to start again).
Asana will remind you via email if you've commented on a task, but not published it, and most likely forgotten about it.
After upgrading to a paid Monzo account, the logo on your card will have a gradient as a subtle reminder that you're on a premium experience.
In the checkout, Booking will tell you that similar hotels which match your criteria have already sold out, creating scarcity.
After completing your budgeting goal, you'll earn points and be showered in confetti. Importantly, this then introduces you to new challenges.