I will use MH as a short of MyHeritage. And this discussion is getting very technical.
I have checked it out and the information about the confirmed record matches as it is in the userinterface on Geni is the same for the basic user as the pro user as for the curators. But the links in the record matches are links to MH and if you are not logged in there or don;t have a data.
The curators and the pro users with the full rights on MH see the same on MH on the MH.
The problem is that if you don't have a full data plan subscription on MH the links to the datarecords are a dead end. A basic user or the Geni API will hit the paywall.
IMHO proof is very important and the the documents are copy right free so that is not the problem. The problem is that the documents are found by a smartmatch that is copyrighted search engine and the direct links it has found also.
So still the discussion is what information should be included in the Geni API and remember it is not the MH API that is under discussion.
The big problem is that the two websites Geni and MH are highly intergrated.