It is possible to stay true to at least a bit of the post-punk/punk subculture while being a corporate magazine - they just don't want to.
They just want to be the new millennial favourite magazine, full of "new edgy" (but not really) things. Unicorns, pastel colours, Ecstasy, weed, aliens, cotton candy, vintage clothing, hip-hop, rap, standardized outrage, tumblr feminism, talking about things that they think they know everything about without actually knowing ****. It's the spoiled educated middle class brat generation of "my opinion is the ultimate truth, everyone is wrong but me, this thing I like is the best thing ever". And... I understand that.
If they want to stay relevant, they HAVE to sell their ideas to the new standard. Be like Dazed, Vice or even POP. Even Teen Vogue is getting Grimes for the cover and going all "edgy-indie-tumblr-feminist-SXSW". It used to be all about the golden years of Vivienne Westwood, now is all about Vetements.
It is sad for people that want something beyond that and expected this magazine to be the uncool gateway. But this is still youth culture. Generation Y youth culture.