What is the difference between Findagrave and BillionGraves?

Here is a link to a very interesting, albeit long, blogpost on BillionGraves explaining the difference between the it and Findagrave. Pictures and maps accompany the text so you can see what they mean and how it applies to your work if you are a genealogical researcher. Personally, I have felt that findagrave.com has gone downhill since being bought by ancestry.com, as I have found more misidentifications online than I had in the past and more postings of alleged graves with no stones or anything. People glom onto those memorials and add all kinds of things to them when, in fact, their ancestor ain't buried there. The down side to BillionGraves is that it only has a fraction of the number of memorials but they apparently have an app and are recruiting volunteers, so if you are a researcher, check it out. This is a multi-part post.