There are a lot of EAs who think that human lives are significantly more important than animal lives, and that future lives matter a lot, so this does not seem totally unreasonable. The most recent piece I read on the subject was this piece from Scott, with two methodologies that suggested one human was worth 320-500 chickens. Having said that, I think he mis-analysed the data slightly - people who selected "I don't think animals have moral value commensurable with the value of a human, and will skip to the end" should have been coded as assigning really high value to humans, not dropped from the analysis. Making this adjustment gives a median estimate of each human being worth just over 1,000 chickens. Bearing in mind that half of all people have above-median estimates, so it could be very worthwhile for them. Using my alternative coding, the 75th percentile answer was human being worth 999,999,999 chickens. So even though it might not be worthwhile for some EAs, it definitely could be for others.