In the settings "Link your Minecraft account for 400 coins" is ambiguous. Am I spending coins or getting coins?
Also, look into Feed the Beast, it's a mod pack (like Tekkit) except built and supported by the developers of the mods. Many of whom feel Tekkit used their mods unfairly without their permission.
I've used NestaCMS (which I would consider a more dynamic Sinatra app than a static site generator) and my current site is built with Jekyll. A lot of these seem interesting (specifically Middleman), but I really don't have the endurance to try them all out.
So, let's hear it. What makes your favorite better than Jekyll?
I'm not saying a Kickstarter type model wouldn't work, but keep in mind that one episode of a show like Game of Thrones* can cost around five million dollars to produce.
This is the key that I missed when I first read the article. Mixins will always be repeated when compiled. Placeholders result in combined selectors so the styles aren't repeated in the compiled CSS.
In many ways, it seems like placeholders would almost always be preferred to mixins. Though, I'm sure there are exceptions.