It sounds like Facebook is volunteering 3 person-years which is nothing resembling a 3 year sponsorship. We're talking at least an order of magnitude difference. 3 person-years sounds like one team at Facebook working on the GIL for 3 months.

It's until the end of 2025, about 2.5 years from now. The comment was by GVR, who is presumably adding up all the pledged time to estimate whether there's enough in total.