You are thinking in bay area figures. The blender foundation is based in the Netherlands and engineers make far less in wages over in Europe. And lastly by open source standards those grants are quite significant.
First link says 100k euros per month supports 20 core engineers. That means 60k euros per engineer per annum, which is a decent salary in Europe.
Imagine if they got the funding level of the Mozilla Corp.
Definitely not travel in first class and book exotic hotels i guess