The Allbirds Outbreak

In the past few months, the number of Allbirds' 'Woolrunners' I have seen at my university, in the midwestern US, has increased almost exponentially.

I think their brand shows the importance of pleasing early adopters; the people who wear these shoes are so pleased with them that they spontaneously recommend them to others.

Wondering if any other followers of the brand have witnessed the same thing.