clarkwinkelmann Sorry for the confusion. Let me explain better.
Currently Flarum only sends one notification, then waits until the user is "caught up" before sending any further notifications. This happens on a per-thread basis, so a user will get notified twice if there's activity on two different threads. If there's any follow-up activity on those threads, no notifications happen unless the user goes back to the site (not sure if Flarum determines if a user is "caught up" based upon viewing the site, or each individual thread).
I want Flarum to send a notification regardless of whether the user is caught up. "Why do that," you ask? In one particular forum, users sometimes delete notifications that don't require them to do anything, but end up not returning to the site. Flarum doesn't send any further notifications, so they end up forgetting for days on end. This causes out-of-band communication via IM's or whatnot, which defeats my purpose for having the forum.
Does that make sense?