FanGraphs Day Two and Three Draft Roundup had a blurb on the Brewers approach...
"The Brewers followed up on their high school-heavy 2023 draft with an even younger group this year, and it reveals an interesting strategy. Their first round pick, Braylon Payne, was generally seen as a second-round prospect. His bonus is likely to be well below the $4.5 million slot value of his pick, with some amount of the excess pool space diverted to the high school pitching prospects they selected in the second and Comp B rounds, New Jersey high schoolers Bryce Meccage and Chris Levonas. They also popped high schoolers in rounds nine and 10, and then took several on Day Three. Not all of these guys are going to sign but several of them will. Recall last year that Brewers got Cooper Pratt’s deal done for $1.3 million in the sixth round and then also signed multiple high schoolers for between $250,000-$550,000 on Day Three of the draft. Day Three picks don’t have bonus slots that reduce your team’s pool if the player doesn’t sign, so aside from a little opportunity cost (the college guy they’d have otherwise taken in round 14 or whatever), the Brewers can now negotiate with a bunch of higher-upside high school players between now and the signing deadline and decide what combination of bonuses and players gives them the best overall class.
Several teams do a version of this every year, but nobody does it to this degree. Whether it was precipitated by the nature of this particular draft class or just how the board fell in the first round (i.e. the Brewers didn’t like who was left on the board, so they pivoted to this strategy), we just don’t know."