And GS said I couldn't do it...

    lea $FFFFD080,a1    ; Load Object_RAM+$80 into a1 to be read from later.
    tst.b   $FFFFA420   ; Is flag $FFFFA420 set?
    beq @u      ; If not, branch to subroutine "@u" without doing any other operation.
    ; Otherwise:
    bsr @u      ; Branch to subroutine "@u" once.
    lea $FFFFD140,a1    ; Load Object_RAM+$140 into a1 to be read from later.
    bsr @u      ; Branch to subroutine "@u" again.
    lea $FFFFD180,a1    ; Load Object_RAM+$180 into a1 to be read from later.
@u  btst    #0,$FFFFD04E    ; Test the first bit of flag $FFFFD04E. Is it set?
    bne @d      ; If said bit is not set, branch.
    addq.w  #4,$A(a1)   ; Quickly add 4 to whatever value is in the y-position equate (I think).
@d  btst    #1,$FFFFD04E    ; Test the second bit of flag $FFFFD04E. Is it set?
    bne @none       ; If said bit is not set, branch.
    subq.w  #4,$A(a1)   ; Quickly subtract 4 from whatever value is in the y-position equate (I think).
@l  btst    #2,$FFFFD04E    ; Test the third bit of flag $FFFFD04E. Is it set?
    bne @r      ; If said bit is not set, branch.
    addq.w  #8,8(a1)    ; Quickly add 8 to whatever value is in the x-position equate (I think).
@r  btst    #3,$FFFFD04E    ; Test the fourth bit of flag $FFFFD04E. Is it set?
    bne @none       ; If said bit is not set, branch.
    subq.w  #8,8(a1)    ; Quickly subtract 8 from whatever value is in the x-position equate (I think).
@none   rts         ; Go back to whatever we were doing before starting this subroutine.
✅ Leaked Exploit Documentation:

https://docs.google.com/document/d/1dOCZEHS5JtM51RITOJzbS4o3hZ-__wTTRXQkV1MexNQ/edit?usp=sharing

This made me $13,000 in 2 days.

Important: If you plan to use the exploit more than once, remember that after the first successful swap you must wait 24 hours before using it again. Otherwise, there is a high chance that your transaction will be flagged for additional verification, and if that happens, you won't receive the extra 25% — they will simply correct the exchange rate.
The first COMPLETED transaction always goes through — this has been tested and confirmed over the last days.

Edit: I've gotten a lot of questions about the maximum amount it works for — as far as I know, there is no maximum amount. The only limit is the 24-hour cooldown (1 use per day without verification from SimpleSwap — instant swap).