I read a national article citing Butch as the one exploiting specifically blueshirting.
The Nutt thing was years before and there were rule changes back then too. They were exploiting something different that was outlawed years before Butch -
"In May 2009, the SEC passed a rule restricting its football teams to accepting no more than 28
National Letters of Intent each year.
[18] This move was widely viewed as a direct response to the
University of Mississippi and its
head coach,
Houston Nutt, having promised 37 scholarships to new recruits for
the 2009 season. Thus the rule is now commonly referred to as "The Houston Nutt Rule."
Saban's big issue was having so many medical retirements. Sounds familiar to UT fans...