1. It costs the charity/nonprofit/NGO money.
It doesn’t matter what you call them, it costs them money to host you. Whether you’re helping for an afternoon, a weekend away, or an extended stay — YOU cost money. Maybe it’s the cost of your breakfast; maybe it’s the cost of the person to clean your fork and spoon. Maybe they have to transfer you from hotel to job site. Maybe you’re using huge quantities of soap to scrub the paint from your elbows. Providing all of that costs money. Alright, it does sound kinda petty — it’s just a $5 meal, a 5-minute ride and a 5pm shower, but think of that times 500 volunteers. It all adds up.