I work in streaming recommendations and basically no one voluntarily gives extra feedback, and most initiatives that aren't machine learning based on true behavior fail on A/B tests.
1.) I don't want to give companies more information about me.
2.) I don't trust that that information will be used to primarily benefit me, I trust that it will be used primarily to keep me on the platform somehow. Ick.
3.) As others have suggested in other comment chains, the way the algorithms have responded to "feedback" I've given it in the past has been so godawful and off-base that I have zero faith it will be of any benefit to contribute my sentiments.