Trade-in option is available for miners. It allows you to purchase new contracts by using your miners as a part of payment. Send a request to firstname.lastname@example.org with "Trade request " in its title. Specify your contract ID, name and hash rate of your miners. We will send you a personal offer after your request would be processed. Information about your contracts and miners can be found in "Operation" tab of your dashboard. The processing of your request can take up to 4-8 weeks.