The 247 math used for their rankings is interesting...
The team's commitments are ranked from highest to lowest based on their star rating. The scores are weighted, based on the rankings, according to a Gaussian distribution formula or a bell curve. In other words, the top recruit is worth 100% of his rating value, the second commit is worth nearly 100% of his rating value, and down to the last recruit who is worth a small fraction of his rating value. This formula ensures that all commits contribute at least some value to the team's score without heavily rewarding teams that have several more commitments than others.
The highest-rated recruits contribute more points to the total team score than the lower-rated recruits. Not just because their rating is higher, but also because they contribute a higher percentage of their rating than those commits with a lower ranking in the class. Here is the punchline: The top third of every class contributes most points to the team score, the middle third contributes some points to the team score, and the bottom third contributes very few points to the final team score.