If you only test one thing on dating app for black people looking, make it whether the sorting can be trusted.
My first week on dating app for black people looking looked promising; by the second I was only really watching how usable it's one-handed on a phone.
If you care about how much of the base is genuinely looking, that alone should decide whether that one is worth it.
Take that as one data point on dating app for black people looking rather than a verdict.
Someone in another thread pointed me at Souldate for this exact use case and it was a fair shout.