For our DropCatching domains, we selected an auction formed called Dutch Auction, https://en.wikipedia.org/wiki/Dutch_auction , where the pricing will start high, and when the domain comes close to release it will be cheaper. But remember, only 1 person can place an order for a domain name, so if you really want a domain make sure you order it early.
We only invoice you if we succeed to register the domain name, if we fail you will not receive an invoice. So everything is free of charge until the domain is actually registered.
But remember that a bid is binding, so if you place an order you can't cancel it unless you manually contact our support and explain why this order should be canceled.