CBP is human. I've always wondered why people fear anything American but when going back to their countries, they carry goods worth thousands and above declaration zone but hide them from their countries' customs. My country men do this all the time. I also do it. I had electronic worth $2K last time I went home and while I was waiting on line, this Kenyan customs lady asked me "How much is this? Do you have the receipt?" Before I could answer and get caught and forced to pay import fee or whatever it's called, she continued "Is it worth below $200?" I said YES and that was how I passed customs without paying. Nowdays I'm smart, I look at them with tough eyes, they count the multiple phones and I just say gifts. And off I go.
That being said, it's $100 stuff. None cares IMHO. I last saw that customs declaration form 10 years ago to be exact. Nowadays CBP just ask me verbally "Do you have anything to declare." I tell them NO and I'm on my way.
Yes, 10 years ago, I was on Emirates and this dude had $10K cash, was bringing exotic pets et al. Boy asked for like 2 declaration forms. I was like 😳. Emirates was issuing paper declaration forms to save time.
On another note, my country is super corrupt. Even non-Kenyans know that $100 bribe to customs let's you sneak away or come in with goods above declaration zone. Just read the reviews of the airport online. How'd you think those exotic pets reach European countries? Hahhaa lemme stop here.