The endowment model is complementary to direct donations, which many of OSE donors make. For example, I did this a lot:
https://kvinogradov.com/algo-sponsors. Some people do this privately, and the largest public case among our donors seems to be
https://ziglang.org/news/300k-from-mitchellh/It requires choosing projects, and most people don't have time for this.
But the main problem is that such funding is simply not sustainable: corporate annual budgets for OSS are volatile, and individual donations are extremely volatile. It is not great for the critical infrastructure we all rely on.
The Open Source Endowment enables truly sustainable funding and also decreases the entry barrier for new OSS donors because it does not require choosing a specific project. A la buying the S&P 500 ETF instead of stock picking.
> Congratulations, you managed to pick out the two projects in the set that make it merely "mostly" (instead of "entirely") frivolous.
Out of curiosity, which founding donors specifically would qualify under your criteria for a "serious" project? If the founders of HashiCorp, Elastic, ClickHouse, Supabase, Nginx, and curl seem like a mostly frivolous band to you...