I think the term "time release" is somewhat a misnomer. By the description it would seem that heating cycles compell the additives to release via migration. So the whole amount of the additives are not released into the oil stream all at once. There may be another explanation that I can't seem to get enough data on to support the theory. Let's say you want to make caustic (hydrogen-hydroxide) ..you can either order caustic 100% ..50% ...or you fill a portion of your tank with caustic potash and fill it with water. You then have a "heel" in the bottom that will remain until you can not saturate the water. That is, the water has suspended as much of the caustic potash as it can. When your specific gravity starts to drop ..you know that you have no heel left in the bottom of the tank.
What I'm saying is that as acid components are introduced into the oil ..the additives should be/are consumed. If you have a cache of additives, like this filter, perhaps they are in a stable enough state that they will only go into suspension upon degradation by acid(s) ...just like a water softener's brine tank uses salt. The water in the brine tank only accepts as much salt as it can (saturated)..the rest is a "heel" that remains until the next regeneration.
Anyway ..it would be nice if this filter works this way. UAO should prove or disprove the "time release" aspect of this approach.