Yeah, I turned a point about how esoteric bets increase the chances for players to try to influence games into a humblebrag!
There also was a thing where guys figured out there was a slight delay on one of the books in tennis and they were able to bet games live by being in the stadium. I think the way it worked was that when a game was 30/40 with the player who was losing serving, the odds for the serving player would be decent. They would still be the favorite, but with odds taking into account the decent chance of a break. Once it got to 30/40, they guys would load up a bet on the serving player winning the game, say $200 at -150. If the serving player won the point to make it deuce, they would immediately place the bet and often could get it before the odds updated to reflect that it was now deuce. They would still lose if the other guy came back to break, but they were getting great odds and by doing it over and over they were crushing it. Not really a way to exploit that, but interesting story.
