#1 is not a pot of gold, rather a stream of gold. The authors' two options are #2 or #3 (or #4 which is a smaller #3). I would classify a true third option as

#1 is not a pot of gold, rather a stream of gold. The authors' two options are #2 or #3 (or #4 which is a smaller #3). I would classify a true third option as private fundraising with secondary sales.