If you do pass, it wont be because of the pill, it would be the water you drank, which served to temporarily dilute the THCA concentration that was present in your bladder at the time, enough to where the urine sample registered below the cutoff thresholds of the drug screen.

I've heard stories of people getting random drug test and popping this pill 30 mins before a test, with 48oz of water
So there you have it - proof positive that the magic pill "works" via the dilution factor. They wouldve passed that same test anyway, just on the 48 oz of water alone and without the magic pill to go along with it.