They're getting paid as part of Jane Street's investment into their hiring pipeline. Then the internship projects got published as open source, which also benef

They're getting paid as part of Jane Street's investment into their hiring pipeline. Then the internship projects got published as open source, which also benefits their hiring pipeline. There's nothing untoward about any of that. At the end of the day, they feed their hiring pipeline, interns get work experience and some cash, and we all get some genuinely interesting open source projects. Win/win/win.