I really don't pay any attention to them.
I believe those rankings put way to much emphasis on unfilled scholarships.
Not uncommon to see a school that signed a 3-star recruit, that has no available scholarships, ranked ahead of a school that signed a couple 5-stars, but has a couple spots unfilled.
I just looked at the rankings in Allen. Florida A&M signed a 609 rated player but have no openings. They are ranked above Missouri, which signed the overall top ranked player, but has one opening. Really? Would anyone choose the FAMU guy over a 813 rated #1 with a roster of only 11.