The electronic edition (plus 1 paper copy) will be available free for a few months. The offer runs out shortly. See https://www.elektormagazine.com/pages/newsletter . I cannot see the catch. Maybe they assume if you like the free ones you will sign up when the free ones end?
If my memory serves me correctly, this started as a Dutch mag that went international in the late 1960s or early 1970s?