Since the earliest version of Bitcoin, it has been possible to combine multiple Bitcoin payments into a single transaction, significantly reducing overhead. Bitit is sending outgoing transactions together in batches to reduce cost.
We are happy to offer clients a significantly reduced fee, but keep in mind that crypto-currency withdrawals will be a bit slower due to the batching. Withdrawals will take anywhere from 10 to 30 minutes longer to broadcast to the network while waiting to be batched together with other payments. This is why when you seen “Preparing Delivery” on your Transaction History it means that your transaction is currently being batched.