Consider a Trifecta punter successful at finding Overs.

Then the effect of halving the rake on the % of action is:

10% => 26%
5% => 20%

Asssuming Overs are distributed according to the spreadsheet NORMSDIST function.

That is someone previously with 5% action can now get 20%. 4 times the action suggests at least 4 times the profit.

That is a phenomenal improvement which could set someone up for life.

There are well documented articles worldwide about the extents big players go to reduce the rake. Yet when an actual opportunity arises which doesn't involve consorting with Triads or whatever, there is an inexplicable reluctance.