I'm a cofounder of a dating app and we actually resisted letting people filter for race. Not sure about the impact on metrics but it is our current position. We let people filter on nationality instead because that speaks to the person's values and world views. We also let people filter based on personality and language.

It's been interesting and fun trying to fix what's wrong with online dating. The big thing being the misalignment of interest. https://www.fairytrail.app/reinventing-the-online-dating-bus...