Epstein did donate some money to SIAI, not sure if it was before or after his first conviction
EDIT: Rob Bensinger says it was seed funding for OpenCog that SIAI was collecting, and that they turned him down in 2016 https://www.lesswrong.com/posts/3JjKWWrKWJ8nysD9r/question-about-a-past-donor-to-miri?commentId=i49RZQgoQZYrXdpis