I honestly would rather see a BSD get 21m in funding versus another database startup that won't exist in 4 years.
I would not be against giving them a few 100Ks so that they could get one or two full time developers however.
(joke (but also food for thoughts): alternatively, just "safe" invest the 21M. At 3% interest rate, that 630k per year, enough for ~2 to 10 developers depending on the geo. An OSS project can do a lot of things with this kind of budget).