“Hey, there's 20 other people studying this, or tens of thousands of students are using us for their algebra and we know you were taking algebra — and then hitting them with, that next test you're going to score way better because so many other people use Quizlet. The social proof is big.”

Hyper-local social proof beats generic "millions of users" copy

Caroline's strongest win-back lever is social proof scoped to the user's exact course or school, not vague platform-wide stats. Naming the cohort ('20 other people in your class', 'students at your school') makes the FOMO concrete and the message feel personally relevant rather than blasted to a list.