Its about time to reinlist about half of my original clients that only opted for the six month program. I have the option of offering a discount if they reciprocate the links. I know that one way incoming links can be more valuable than reciprocated. What about having a significant number of outbound one way on topic links versus having them reciprocated. For some reason, I feel as though there is some value to the fact that it is unreciprocated. After all, it wouldn't make sense to reward someone for getting a one way link and penalize the one that gave it. OTOH, it would have to make sense if PR calculations were a zero sum game.
Plus, I don't want to give a discount.