Why did I stop? I got diverted by other projects, such as what became MAPR and the minnow community that preceded it.

The other issue was that we seem to have reached the saturation point of mathematicians on Steem! Or at least those who wanted to do puzzles. In my mind I wanted to create something like Stackexchange, but that is driven by a lot of students - students we really don't seem to have attracted here!

Now that there are more tools and platforms available, might be an idea to revisit that aim.