StuffIt Expander has gone to the Mac App Store. New downloads from here point to the MAS, and the Sparkle feed (below) now points to a manual download from the MAS as well. Possibly consider removing the StuffIt Expander recipes?
$ curl http://www.stuffit.com/update_rss/NEU/StuffItExpanderUpdates.xml
<?xml version="1.0" encoding="utf-8"?>
<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" version="2.0">
<channel>
<title>StuffIt Expander Updates</title>
<link>http://www.stuffit.com</link>
<description>Updates for StuffIt Expander</description>
<docs>http://blogs.law.harvard.edu/tech/rss</docs>
<language>en</language>
<pubDate>Wed, 5 Sep 2012 11:59:00 -0700</pubDate>
<lastBuildDate>Wed, 5 Sep 2012 11:59:00 -0700</lastBuildDate>
<item>
<title>StuffIt Expander 16.0.6</title>
<description><![CDATA[
<h2>StuffIt Expander</h2>
StuffIt Expander updates are now available on the <a href="https://itunes.apple.com/us/app/stuffit-expander-16/id919269455">Mac App Store<a/>.
]]>
</description>
<pubDate>Mon, 30 Oct 2017 18:22:00 -0800</pubDate>
<sparkle:shortVersionString>16.0.6</sparkle:shortVersionString>
<sparkle:version>6477</sparkle:version>
<link>http://my.smithmicro.com/stuffit-expander-mac.html</link>
</item>
</channel>
</rss>
StuffIt Expander has gone to the Mac App Store. New downloads from here point to the MAS, and the Sparkle feed (below) now points to a manual download from the MAS as well. Possibly consider removing the StuffIt Expander recipes?