Probably a lot more stuff would get done in KDE with more money, no? Big things like moving away from Bugzilla, supporting more languages like Python and Rust for KDE app development, (way) better documentation, marketing, ads, fulltime employees (marketing, UX/UI designers, developers, sysadmins, devops, lawyers, etc.).
I’d love to work for KDE for example, but without having to first contribute to it for years, get recognised by some important community members, give talks, and then finally maybe see some money to work fullfime on a project. There are probably many, many developers who would rather write opensource code fulltime, remotely and be paid a livable wage instead of toiling away in some for-profit business writing proprietary code built on top of opensource and never contributing back to the greater good.