@nds I've now read one of the submitted issues. ISTM the person does not understand how feeds work (maybe add to your docs). #Spigot is a new #RSS / #Atom subscriber, so it grabs everything that any other feed subscriber would see. If $USER does not want $SUBSCRIBER to see old articles, s/he should reduce the number of articles in the feed or publish new articles frequently.
Otherwise, do not give up on your project just because someone does not grok what it does or how it does it.