The site now uses https and redirects http to https[1]. This apparently had the side effect of breaking its usage in uBlock as it now shows as 0 out of 0 filters even when forcing an update.

The filter lists should be updated to use https in both uBlock and uMatrix.

Perhaps this also does raise another point, if the site redirects http to https, should uBlock be resilient and allow this? It seems uMatrix continued to work correctly.

[1] https://hphosts.blogspot.com/2016/06/info-hphosts-forums-and-website.html