It can be very frustrating when you get your results, and not too many people want to reply to you! I have had some success, finding a 4th cousin, who lives in the same area as me, and who is related thru my gx3 grand father. She is related to one of the oldest children, I am related to a younger son, but she did not appear to be aware of any of the other children, so knew nothing about the whole maze of people descended from the younger children. And funnily enough, she is also related to me through marriage - her cousin is married to my closest cousin on my father's side!
However, frustratingly, I have found 2 connections at 3rd cousin level (and at the extremely high confidence level), to a branch of my dad's side, that we have very little information about. This is because the family name (Burke) is the most common name where they come from (near Clifden, Connemara, County Galway), and my great grandmother, Margaret Burke, was the only one to come to Scotland. All the other family I know of, 2 elder sisters, and a younger brother, went to America, and we know very little about what happened after that - though the younger boy died without children we believe. My Grandmother has been dead for > 60 years, so can't really ask questions, and my dad and his younger sister, are the only grand children still alive, and Dad is 92!. Any way, to be third cousins, these 2 connections (who I think are sisters), they must be pretty directly connected to my great grandmother's family ( - i presume to one of her siblings, or perhaps siblings of her parents). However, looking at their family tree, although they have all the right surnames etc, I just cant see exactly where the connection would be!! I only messaged one of these 'sisters' - but as yet I have had no reply. It is infuriating, but what can you do!! These 2 ladies live in the US, probably east coast, as their father died in Pennsylvania.
Like someone else said earlier, they may not have logged in recently, they may only be interested in the ethnicity results...Agh! I will contact the other one, who's tree is managed by someone else, so I suspect theses two ladies are probably pretty old ( ie older than me, I'm nearly 62!) and it is probably their children who are the active researchers!