I don't really get comments about unreasonable labor in this comment and TFA. It's what, 16x16 = 256 SIM cards per such machine. At 10 seconds per SIM card, that's like an hour to fill one machine. In a week at 8 hours per day you can fill 40 such machines with SIM cards.
Yeah, I don't think labor is a problem here since the people willing to make this happen somehow also found 1) money to buy these racks, 2) many times 256 SIM cards, 3) a few locations in NYC