Board Thread:Help desk/@comment-95.154.43.132-20130124122552/@comment-76.23.112.240-20130125052655

It does infact drop off by .01 for every soul collected, but stops when it gets down to .5 per soul. It will remain .5 for the rest of the game. Also upon reaching 255 souls the damnation counter resets and you recieve a new buff called soul glutton. Soul Glutton grants the same bonuses as having 255 souls. The bonus per soul does NOT reset when the damnation counter resets though and you still recieve .5 for each additional soul.