It's not dependent on the state, it depends on the carrier.
If it ships through USPS, you will almost never, ever get customs fees and that's why SSense send em that way. Other shippers from UK also uses Royal Mail which then hands it off to USPS and you will not get customs fees.
FedEx and UPS seems like a coin flip, really depends how much the shippers declares in the packaging. DHL almost always gets hit with customs. There are other third party handlers that also hold the package until you pay, like RMX for example. It's really up to the shipper, I always try to ask them to label them cheap like OkiNi and LNCC will do that if you ask them while others are stubborn like Matches.