I wonder if reputation systems might work here - you could give anyone who id's with an AML/KYC provider some reputation, enough for two or three reports, let people earn reputation digging through zero rep submissions and give someone like 10,000 reputation for each accurate vulnerability found, and 100s for any accurate promoted vulnerabilities. This would let people interact anonymously if they want to edit, quickly if they found something important and are willing to AML/KYC, and privilege quality people.
Either way, AI is definitely changing economics of this stuff, in this case enshittifying first.