The "FamilySearch™ International Genealogical Index v5.0 Continental Europe Family Group Record" seems interesting. Does this source have a weblink? It so, it'd be nice to add.
As for looking at anyone's family trees, I've done that many times only to see find names, dates, and places but zero validating sources attached. On FamilySearch, too many users enter "GEDCOM data" in the "Reason This Information Is Correct field.
https://www.familysearch.org/wiki/en/Using_the_Genealogical_Proof_S...