You wouldn't calculate the expected RoI of killing adblockers if killing adblockers was never considered.
The CEO of an organization like Mozilla even considering blocking adblockers for profit is like the president of Amnesty International considering to sell lists of dissidents to the secret police.
No, for Amnesty International it would be more like not considering somebody a political prisoner because the country that took the prisoner is a 1st world country and they don't want to expose themselves on a matter that would risk the donations from a certain population.
Yes, that happened in the aftermath of the Catalan attempt at peaceful independence in October 2017 by Amnesty International Spain.
On day one he’s put his appearance on the top of hacker news under “is Mozilla trying to kill himself?”.
edited to correct my misunderstanding.
I agree, although if someone isn't the kind of person who would calculate that, they're probably not the person who will become the CEO of a company that size in the first place. I don't think organizations have the right incentives in place to push people with those values to the top.
Why? They have ample free cashflow. They haven't had money problems in 10 years. If they're worried about Google withdrawing support they should save money in an endowment, not do things to help Google.