There are unsalted varieties as well as pretzels filled with cream cheese or served with dipping sauces. (disneybaby.com)
I typically use unsalted varieties, but I will sometimes mix in lightly salted for extra flavor. (fakefoodfree.com)
For me, I generally buy unsalted (and then usually add salt to whatever I'm making with it) only because unsalted varieties are often the only ones that are cultured. (marksdailyapple.com)