I am confused. Paypal charges the fee per transaction. running mass pay 1000 times with 1 transaction is the same price as running it 4 times with 250 transac

I am confused. Paypal charges the fee per transaction. running mass pay 1000 times with 1 transaction is the same price as running it 4 times with 250 transactions. Paypal lets you run as many total transactions as you want. The max batch size is 250.