We have tried three ways to share KP between players for there AW's. We will be dropping the first two, and adding a fourth if I can get it all worked out.
KP swaps (as discussed above). We get 6 consistent players with these and usually they fade away after a few weeks at most. That's our fs and may not be the experience of other fellowships.
Wonder Wednesday. Every six months we generate a randomized list of players in our fs (all are included). Each week, on Tuesday we announce the target player and contribute whatever amount we wish to the players favorite AW. Generally speaking about 1/2 of the time it's enough to get it to the next level. 10-15 players on average each week put in between 5-40 KP, with the average probably 15 KP.
Shout Outs. We use Chat to announce when an AW we are working on has chests still unclaimed and is either 2/3 done (KP gathered so that no more than 1/3 is still needed for the next upgrade) or within 100 of the next upgrade, whichever is LESS We almost always claim the rest of the chests within an hour or two and finish the AW as well. We have about 15-20 members participate and, in fact, often find that if you don't jump in fast the thing is finished before you know it.
Similar to the Wonder Society, (and maybe even identical since though I've read it I'm still not completely clear on it), we are organizing AW Teams. We will take 5 players with 5 similar AW needs. Say 430 needed with 5 chests. Let's call the players A, B, C, D, and E. Player A has an AW with 430 needed and puts 215 on it (1/2 however long it takes). They then message the team (when the team is organized a msg is posted with the names, the AW's and the total needs). Upon reaching the 1/2 way mark the player calls for a "Pile on". Player B is responsible for 1/2 of the remaining (108), Player C for 1/4 of the remaining (54), Player D, 1/8 (27) and player E 1/16, (14). This always leaves a few but not enough to displace any of the other players. The totals are tracked by the Team Captain, and when the chests have been claimed it's Player B's turn. Once the rotation is complete the totals each gave are added up and if there is any significant problems adjustments can be made. I don't expect any significant problems is every one does what they are supposed to do. The only caveat is if others, outside the team, contribute anything significant -- that would have to be dealt with as it comes up. In any case we are still working out the details and getting ready to test it all. AND we don't know how difficult it might be to do it for other AW sizes/chest counts, etc.
Those are what we are doing, have done, will continue to do. The Shout Outs are the strongest thing we do at this time.
AJ