I’m not sure how large the database is but I have matches there that have not tested at ancestry and ancestry won’t allow anyone else to upload data. The tools are more refined and you can see which chromosomes you match on and compare specific people and oh it’s extremely useful! Ethnicity is touched at more on ancestry.
Interesting.
I have a challenge in that I have a name of a great-grandfather, but the only evidence of a man by that name is a 1930s census. There is no other record of that man. He was supposedly born around 1880 in Missouri, but I can find no such record. At one point, I got the bright idea that I could check my grandfather’s birth certificate and maybe find there the name of his father. Nope. My grandfather’s birth certificate was filed by his mother in California when he was in his 20s (and he was born in TX). I suspect that whoever my great-grandfather was, he was using a false name.
I hope that by comparing DNA results and finding relatives who have no common name, I may be able to deduce who my great-grandfather really was.