I don't use enough regular Acufine to justify replenishing it, but I do reuse it. I buy the one gallon can, keep track of the number of rolls/sheets I've used, and pour it back into the bottle when I'm done. The basic recommendation is to increase development time by 2% after 16 rolls/quart, so after 64 rolls/gallon, and it's very long lasting, so if you were replenishing, you could process a lot of film before having to replenish.

It is very handy to have one developer that I can just use out of the bottle at room temperature usually and pour it back when I'm done.