I know. We're sad too. We had such high hopes for this idea.
What happened? Where did it go?
We wrote a blog post all about it. The short version: it wasn't sustainable. The long version is a bit more complicated and dramatic. It also includes a few animated gifs to break the tension.
If you're currently on Unlimited, don't worry. You're grandfathered in. We would never pull the rug out from underneath anyone. Check out the blog post for more details.