These guys didn't do their homework correctly. Keeping aside commercial vendors; their own garage setup for doomed to fail with their coverage (or lack thereof). Garbage in, garbage out.
I would urge you to watch a statistical debunking of these so-called "global goodness" metrics. Sanjeev Sanyal does a good job of it [1],[2],[3]
Multiple organization(s) that manage such indices are, turns out, funded by the same cabal who want to concoct a narrative. They are not unbiased.