<p>Could it be that the reason the the ML site is not going to well is because of <a href="http://metaoptimize.com/qa/questions/" rel="nofollow noreferrer">meta optimize</a> which handles these ML questions? It has a big community outside SE, as mathoverflow does as well.</p>
<p>I have found ML questions hard to place in SE as well. It does not even fit into scicomp.stackexchange.com/ that well. But people are right now placing questions about ML in sites like CV. I posted an ANN question a couple of days ago here because I am not part of the beta for ML, and have not had an answer.</p>
