> in the US you only need to go through fingerprinting only once (or maybe "once per passport")

I’ve entered the US something like 150 times over 20 years. Visa free (ESTA) and on a B1 tourist visa.

I’ve been fingerprinted and photographed every single time.

As has been discussed elsewhere, this sounds more like you are flagged than SOP.

Never had a problem, never any hint or talk that anything is amiss. Always extremely routine.

	▲	maratc 4 hours ago \| parent \| next [-]
		Well, entering the US an average of 7.5 times each year is hardly usual, unless one's a Canadian living near the border and jumping to a Costco on the other side.
	▲	whimsicalism 19 hours ago \| parent \| prev [-]
		> never any hint or talk that anything is amiss there never is