I can see that Stack “exposes me to things I would never look at any other way” but they’re still magazines you could probably find in any decent bookshop or newsagent. The selection looks relentlessly stylish.
It would be great if Stack (or a similar service) found magazines that you’d never find in high street shops. Really niche magazines, journals from industries you know nothing about, newsletters you’ve never seen or even heard of. That would be much more eye-opening and horizon-expanding.