I'd like it if i made the 10 or so coins i could have mined back... but at a 1% fee reduction, that'd take 2 months if the difficulty remains the same...

Its really just a business decision on your part Wolf0. I have no idea what your costs are, what you want to get out of the Pool and/or what your plan is going forward. Or whether or not its worth offering that kind of incentive to get people back on board, most people tend to forget things quickly so it might be pointless?

I'm sure if you decided to do it for the addresses that verifiably missed out on returns you'd gain a loyal user base though. Its your decision as to whether the inevitable loss that occurs is worth the loyalty and the potential gains via word of mouth/forum checking when choosing pools for moneo.

Most importantly, whatever you decide to do, make it public (perhaps a banner on the pool page so people know) and stick to it

Cheers mate