Regarding the demand-side fatigue of evaluating projects, I’d highly encourage folks to look into the pairwise-preference based approaches that have been developed over the last few years. They’ve gotten less attention than QF-based approaches but have a lot to recommend them from the perspective of cognitive overload.
The big lift is that they simplify the evaluation process: instead of evaluating every project in absolute terms, funders can make relative choices between projects – much easier to do at scale.
These techniques were first (to my knowledge) developed by Colony with their BudgetBox mechanism, which was picked up by General Magic with Pairwise, and by dOrg with Pairdrop, so at this point there are multiple working implementations to play with.