What's crazy is the amount of small schools that are ahead of the curve on these types of kids. They don't go in looking for 4-5* type talent obviously; they just see a kid who they think can play at their level. Then some of these guys turn out to be coveted by the who's who of CFB.
I think the services have a smaller number of 4/5star kids early in the process and when kids like this get offers they then boost then into such rankings.
Would love to know for instance if the number of 2019 4/5stars is less than the number of such rankings in the 2017 class. If that is correct my theory is correct and those services rely significantly on offers for their evaluation process