1- You pay them the exact same tax that Muslim civilians pay, but relabel. 2- They won't slaughter you if you're not armed nor an obstacle, they're prohibited from plundering (stealing during war), and they're prohibited from raping your daughter don't worry, and ngl being a slave to them is better for you since you look like you're in poverty, they'll treat you well since they're ordered to feed you from their own food. 3- There's nothing wrong with this.