Yes, in professional sports today, the line between fair play and business interests has become very thin. With huge sums of money circulating in the market from point spreads and individual player statistics, any subtle change in the roster is perceived as a threat to the market. This analytical article
https://collegeinsider.com/nba-fines...rts-are-saying , which I stumbled upon online quite by accident, provides a good overview of the situation. I liked that it offers a detailed analysis of how betting lines have become increasingly sensitive to coaching staff decisions in recent years. It seems to me that in modern basketball, it’s no longer possible to keep a strategy completely under wraps. And in your amateur league, do coaches usually give advance notice of rotations, or do they make substitutions right in the middle of the game?