alt Hacker NewsThe movie _Casino_ highlights how insider information was and is used to improve the house odds [0].
Information about a players wellbeing and their life goes a long way. Example, they would pay paper boys to talk to coaches to find out non public information. Such as if a player of the team is going through relationship problems.
All of which is significantly harder than putting up a gigantic billboard that says "Have insider knowledge on an important event? Place a bet here using crypto!"
Every important event in the world has dozens if not hundreds of people "in the know" before it happens. Not everyone has paper boys, chatty coaches, or the time/energy required to connect all those dots.
The entire flow insider information is reversed from "go out and look for it" to "invite it in anonymously"