and those who got nothing would feel horrible.
and some of those who gave, and gave, and gave but didn't get the same amount back would be dissapointed.
and some would expect everything and give nothing.
sorry to be a wet blanket but this is not a good idea in a group this huge.
it's very easy to be generous, though. all you have to do is "listen" to what's already posted. you'll easily find people you can help with RAKs.