[judge2020]

YouTube only had 100 million users in 2009[0] - not an insignificant amount, but even after introducing ads in the same year[1], they've gained 2 billion+ users.

0: https://www.comscore.com/Insights/Press-Releases/2009/3/YouT...

1: https://www.theatlantic.com/technology/archive/2011/08/infog....