The concept of Billion Graves is a good one. The design is NOT user friendly. The website is supposed to link with My Heritage. It might, It might not. A few of my photos have appeared on My Heritage which is why I chose to join Billion Graves. However, more often than not, my clear photos transcribed by myself on Billion Graves have not shown on My Heritage and the time frame has been 10 months. Very disappointed with Billion Graves. Their promise exceeds the products ability.
We share photos and information with My Heritage and FamilySearch. However, if you have taken photos outside of the app, these are considered supporting records and are not shared with either company as these types of records can not be verified for 100% certainty, like those taken with the app. Photos taken with the app have a GPS tag on them. This shows the exact location of where a photo was taken. Photos taken outside of our app are not shared with other entities because they can't be verified.
The only website we currently link with as far as trees are concerned is FamilySearch as these are public trees that can be viewed by anyone. We do not link to private trees on My Heritage or Ancestry. We have articles written on the help desk that explain all of this in detail.