I check alternate.ch (and caseking.de) as well and I understand your frustration with digitec (the fact that they still don't have a fidelity program to give back to the people who spend thousands or tens of thousands of chf a year on their site is simply mind blowing...).
Beware though, that alternate.ch ships from germany as far as I can tell/remember. So you get a tax discount when you shop but you'll receive a bill from customs later.