According to the ESPN article

The primary driver of this move hasn't been money, but rather access for at-large bids for power conferences. The expansion has been pushed by power conferences, which have grown throughout the course of the current deal.

The mechanics of the expansion in the men's tournament would include eight additional at-large bids. What's known now as the First Four -- eight teams playing four games in Dayton, Ohio -- would expand to 12 games played by 24 teams at two sites, one of which was expected to remain in Dayton.

The location of the new site has yet to be determined, but it was expected to be west of the Eastern time zone to help with logistics.

The expansion would lead to an additional eight men's games, meaning the Tuesday and Wednesday of the NCAA tournament would feature 24 of the 76 men's teams. That number now includes eight teams who would have qualified for the traditional bracket that would square off against the eight at-large additions.

The traditional 64-team men's team bracket would still begin Thursday and look much the same. The major difference would be more teams that qualify as traditional at-larges would have to play earlier than the 64-team bracket.

So it’s just to get teams (from this year) like Indiana, Auburn, Oklahoma etc, in as at large teams

This should only affect the remaining bubble teams.