The 'We have not seen any significant revenue impact" might have something to do with investors not questioning anything. Hell for all I know the API change might have been their idea in the form of "Hey Elon started to charge of the api and nothing burned to the ground. Why don't we try".
"we have a list of improvements we’d like to see both on the moderation side of Lemmy and federation if at all possible" so out of curiosity whats on that list