It’s about business model. We were happy to have those fine publications on our system. But as our needs and theirs diverged, we were happy to let them pursue their visions elsewhere.
I personally believe that quality, ad-only funded publishing is unsustainable. Few in the professional publishing world disagree with that. We are steadfastly focused on building a subscription-based publishing model, where quality content (from individual authors and publications) gets rewarded based on its value to readers.
If remuneration is not part of the equation for why you publish, I can’t imagine a stand-alone web site serving you better than Medium in terms of cost, simplicity, and, most importantly, reaching an audience.
If remuneration is part of your equation, you’re also in the right place, as long as you’re not looking to build an advertising-funded site.