We ask for a donation to put testimonies on this site because we personally work on each page and after a while we get hungry and we have to pay for food.
Seriously, we don't think that this site should have advertising on it to help pay for the site expenses and time spent working on it. That would be tacky.
However, we don't have a set donation amount because we want everyone to be able to share their loved one's story - even if they aren't rich. So you can donate an amount that combines your heart's desire with your wallet's reality.