I'm delighted to say we get a decent income from Patreon supporters and GitHub sponsors, as well as a little from commercial sponsors. It covers our running costs, and leaves some left over to save for contingency, and reward some contributors (myself included!).
I don't know what an Optiver salary would be (though I can guess: I work in finance too), but no, it's absolutely not a living wage :), lucky though I am to have anything for an Open Source project.
I do it as it's something I feel strongly about; it's got my name (and reputation!) staked on it (not as I'd planned it); and it's given me enormous opportunities too!
Compiler Explorer - https://news.ycombinator.com/item?id=24066570 - Aug 2020 (48 comments)
Compiler Explorer - https://news.ycombinator.com/item?id=18671993 - Dec 2018 (44 comments)
RMSbolt – An implementation of the Godbolt compiler-explorer for Emacs - https://news.ycombinator.com/item?id=18104167 - Sept 2018 (9 comments)
Compiler bug in MSVC? - https://news.ycombinator.com/item?id=16142512 - Jan 2018 (2 comments)
C compiler undefined behavior: calls never-called function - https://news.ycombinator.com/item?id=15147335 - Sept 2017 (83 comments)
GodBolt: Enter C, get Assembly - https://news.ycombinator.com/item?id=13182726 - Dec 2016 (151 comments)
Compiler Explorer – now with side-by-side compiler comparison - https://news.ycombinator.com/item?id=12627295 - Oct 2016 (6 comments)
Compiler Explorer - https://news.ycombinator.com/item?id=11671730 - May 2016 (38 comments)
Interactive C++ Assembly Explorer - https://news.ycombinator.com/item?id=9861294 - July 2015 (8 comments)
See What Your C Function Compiles To - https://news.ycombinator.com/item?id=9808870 - June 2015 (2 comments)
C/C++ Fiddle - https://news.ycombinator.com/item?id=7593109 - April 2014 (40 comments)
Interactively watch how your C++ gets compiled. - https://news.ycombinator.com/item?id=4020814 - May 2012 (1 comment)