As Andrew mentions in the post, even having a Twitter account was a source of stress. It's about more than just promoting his content.
It's a feeling I can sympathize with. In 2009 I deleted my Facebook account (or "deactivated" it, the only option at the time), and even though I wasn't using it much by then, it felt like a needless weight was suddenly lifted.
Haha, you think reddit values OC? They love to say they do, but then you get caught in spam filters, reported for "self promotion" (because how dare you use a proper blogging site over reddit's markdown self post), and overall called a shill because you don't revolve your life around reddit before daring to share something you thought the community would resonate in.
It can be done, but it just shows another hypocritical angle of that community.