Keeping active patrons, not necessarily using service directly

Hi, I was wondering if anyone has a way they track partner organization usage into KLAS.

People who want Newsline, for example, Newsline sends us a request to verify their eligibility as a patron, and they proceed with their process. How about JBI or Xavier? What if a patron wants books exclusively from them, but only needs a machine from us? How can we keep them active if they aren't getting books or using BARD from us? We can have a work around by people who want just the Bible, we can say, yes, their one book this year is the Bible and adjust their last served date. But what about others? I saw a few inactive accounts just by chance this year with comments saying they wanted Xavier information -- which got me thinking there could be many more!

Any ideas? Can we add something like a subscription in KLAS? Or, does someone out there already have a cool trick to track? We want to keep active people!
Thanks, Maureen from FL