How is the D programming language financed?

[Thomas Mader]

I would be interested in how the D programming language is financed as a 
project?
As it seems the core projects at the moment are dmd, druntime and phobos.
All of these are in a very active state with multiple contributors when 
judging the revision logs.

I guess many of these contributors are volunteers but are there also 
people who get somehow money for their work?

It's conceivable that Andrei, Walter and others get money for talks they 
give but is there anybody who can work on D fulltime without the need to 
do a daytime job beside it?

I know that Andrei works as a research scientist for Facebook but how do 
other main contributors get their money?

I wonder how people can manage to work on a fulltime job and on D.

Who pays the needed infrastructure?

Thomas