alt Hacker NewsI think the SQLite model of contribution "Open-Source, not Open-Contribution" is a good middle ground to keep maintainer's sanity while having the code open [1]:
"SQLite is open-source, meaning that you can make as many copies of it as you want and do whatever you want with those copies, without limitation. But SQLite is not open-contribution. In order to keep SQLite in the public domain and ensure that the code does not become contaminated with proprietary or licensed content, the project does not accept patches from people who have not submitted an affidavit dedicating their contribution into the public domain."
The text you quoted is purely about copyright/licensing, not about the maintainers' sanity.
The more relevant quote is: "In order to keep SQLite completely free and unencumbered by copyright, the project does not accept patches from random people on the internet. There is a process to get a patch accepted, but that process is involved and for smaller changes is not normally worth the effort." Though this is still about copyright, not about being swamped with PRs.