I'm a simple man. When I 3bet, I slam the pot button. You min raise, I slam pot with my 3bet and now pot is medium size. You pot raise, I slam pot with my 3bet, now pots huge.

However, these nit rakeback grinding regs are doing some kind prehistoric formula of pot + 2 bb oop, or pot - 1 bb in position. Is there any theory backing these kinds of 3bet sizings? If the only reason people do this is because they want more folds when they are out of position and more calls in position, then there is clearly some ways to exploit these sizings.