Aside from the many issues mentioned already, these methodologies cannot compare them with the applicant body of the next year, nor can they really compare them with the applicant bodies of the previous years. That data is not available in many or most cases.
Bottom line - as has been repeated ad nauseam here - there is not secret formula for getting accepted to any colleges with low acceptance, AKA colleges with holistic admissions. If any college search company had the actual ability to figure out what a student needs to ensure their admission to these colleges, they would be mobbed every year by the 200,000 or so non-hooked students who are “have always dreamed of attending Harvard/Yale/MIT/Princeton/etc…”.
The money that they make form generic advice and cliches would be nothing compared to the billions they would make from providing this information to all those parents looking to buy certainty of admissions to an “elite” college. I mean, do it for $50,000 a pop, which is a bargain, considering that Singer was charging $500,000 to get a kid into USC. There were 50 parents charged in the admissions scandal, and those were just the ones who were caught. There are hundreds of kids each year from the top 0.1%, and, according to the NYT article over 60% of them attend a college which is not in the “elite” category. How many of them would happily part with the cost of one or two year’s attendance to make sure that their kid attends an “elite” college?
CollegeVine or any other one of these companies would make a mint, and the only thing that they would do online is post advertising.
ECs differ in their “attractiveness”, and they differ between AOs, years, and colleges. So this is only slightly better. At some schools, Asians are not ORMs, and some colleges, like the UCs are prohibited from using race in calculations.
Moreover, is that 20% of the total chance or overall 20%, meaning, if an Asian student has a “chance” which is “calculated” at 20%, should they now consider it impossible to be accepted or have it dropped to 16%?