I get what you are lamenting in general, I would like to see OpenSSL or Django or perhaps even Linux better funded for example. It just seems to me that this is not a case where any lamenting is justified. If the newly-community-owned Jest doesn’t get investment, then sure, that would be lamentable. But that hasn’t happened yet. Indeed, FB divesting ownership was a necessary condition for any serious outside investment to occur, IMO.
Now reading back, I realise that I might have gotten confused and took the numbers that were referring to the Facebook project, thinking it was the Linux donations.
Sorry for the confusion.
Overall their financial contributions could be in the millions. Don't think about the small amount they've done recently.