I weep for the home of Daniel Webster to be so incautious as to leave written proof of open and notorious violations of the Ivy Common Agreement.
I don’t think anyone disputes this happens, particularly in sports with small cohorts of recruits, where a jump in one recruit’s ACT can make a significant difference. It may be frowned upon, but it is not, ipso facto, prohibited. It is called dumbbelling. It is why the band system was put in place for football, and why the men’s basketball rules changed a few years ago.
Mine is too. So is @varska’s and many others. And sure, any list of recruits being supported for a likely letter will contain recruits with varying academic strengths. That is how coaches build a class in this environment. If what you are describing is something akin to the band system in football, where an Ivy coach gets a few recruits with academics maybe pretty far below the type of student usually admitted, and a few recruits who are closer in line with the academic stats of the college as a whole, then I don’t think anyone would disagree. On the other hand, if what you are saying is that a coach can specify varying levels of support based on his or her judgment of how desirable a recruit is, then many of us just disagree. That has been our personal experience, and it is in conformity with the rules as they exist.