Obviously Mastadon's getting uptake due to this Twitter drama, but how much traffic is actually moving there? Is it just think tankers, media personalities etc

Obviously Mastadon's getting uptake due to this Twitter drama, but how much traffic is actually moving there? Is it just think tankers, media personalities etc. preparing stuff there in case of something or is the overall readership actually getting onboard also? I've seen a 2 magnitude increase in downloads on the app store, but I'm not sure how to find overall usage numbers.