Now that Protonmail has an ok-ish PGP interface they've been bleeding users, it's a really important piece of the open source infrastructure and I hope folks support it -- back when I was with Mozilla, I said they should focus on using less ram and less CPU, not weird little side quests like... well the list goes on and on.
One thing I think we should do is allow Thunderbird to return to the early Firefox model -- it's a stable product, that people can install extensions on. Save for security updates and keeping up with OS quirks, it doesn't need constant tinkering.
I'm not saying they don't need the money, I'm just saying I'm concerned how and why we got to this point.