alt Hacker NewsA quick AI Google search and some fact-checking later, and yeah. At least as of 2 years ago, Thunderbird was getting 3x the contributions that Blender was.
It just goes to show you how badly managed Thunderbird is, since Blender is doing so much more with the money. I'm more and more disappointed with Mozilla all the time.
It couldn't possibly be that Blender simply has much more volunteer contributions?
Since hacking on a 3D DCC in your spare time may be more than three times as enticing to people than doing the same on an email client?
I'd wager Occam's razor favors this explanation.