It's traceable with a US warrant. If you are outside the US this is sufficient protection for many people. For example even close US allies (eg five eyes) have

It's traceable with a US warrant. If you are outside the US this is sufficient protection for many people. For example even close US allies (eg five eyes) have to go through the US court system to get this warrant, and that is a slow, annoying process when you aren't based in the US. It raises the level of friction to meaning it will only happen for somewhat major investigations. If you are a major drug dealer, then yes, they'll do it. If they catch you with some small amount of some drug, then it's unlikely they'll chase it.