Questions about Chester/The re-gifter/Arcanite chester passives

[Thewolfbull]

Chesters passive says: Increased chance on dealing damage to increase gold drop rate 20% for nearby allies.

The Re-gifter passive says: Increased chance on dealing damage to boost gold loot 25% for nearby allies.


Does this mean that chesters passive only increases the chances of a mob dropping a pile of gold, and because of that it is useless on bosses as a boss can only drop 1 pile of gold anyway?

While The re-gifters passive increases every single pile of golds amount that drops?

Also wondering if the 25% chance to increase gold drop rate on arcanite chester can stack with chesters 20%?