His other comment clarifies this:
"The team was all mathematicians. We did the math. I helped one of our data scientists put a model into production that saved $15M a year from that model alone, and we had a dozen people like that. We were working on signal loss models that had potential to save billions. I genuinely do not understand the logic of cutting this team to save costs."
https://news.ycombinator.com/item?id=33806727