You're conflating projects with people. Some people have multiple projects that were funded, most people have none.
The costs for maintaining projects is high, so the projects that don't receive grants, or where grants have ended, just let the infrastructure contracts run out and abandon the repos. What we see leftover and heavily-marketed is grant stuff, but that doesn't mean that nothing else was created or that nobody is working on anything else.
And they don't just give out grants for whatever. They have specific themes and topics and they select projects that fit.