this is a great idea, i was going to put a comment like this.... and also if possible for every category, the bot should be programmed in a way that when the bot votes it should increase the power as it votes more post. for example a contribution received the first vote of the bot and the contributor got a vote worth of 20$, now there are so many contributions a day, so the last post which is also in the same category and somehow better than the first post received the same powered vote, but because of less voting power now the contributor will receive lets say 15$, that doesn't seem fair. but adding a voting slider for the moderators so they can mark the contribution, how good it is, can be very effective....