Without those things open source would slowly die. All of those are about getting more users for products, getting funding to make them happen, but more importantly, inspiring the next group of contributors.

Open source doesn't just appear out of thin air. It costs money and time. People need to care about it.

Without users, a project is just a hobby and unlikely to persist long term. Without funding, contributors are forced to abandon for jobs to out food on the table. Without the next group of contributors to pass the torch onto, projects die.