Confusion Over Mixpanel Event Limits: Free vs Growth Plans Explained

The Mixpanel site says that the free plan event limit is 1m, but I’m using it without any problems even though the number of events in my current project is over 2m. When I search, the limit is 20m. Which is correct? I want to change to the growth plan this time because the number of events is the same as the free plan, but I’m confused.