The specific duration of an Open-Ended contract is variable and determined by three factors: The mining difficulty, the Bitcoin vs USD exchange rates and the maintenance fee (This includes all electricity, cooling, development and servicing costs). Official Zcash ZEC Mining Software on this page. We cannot control the first two factors which are unpredictable, but we do always deploy the latest mining technology, and do our best to keep it running at their maximum capability for you.

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Please note: • When partner capacity is reached, we may switch to Altcoin mining. • Payments are taken in $USD. Is ZenCash ZEN Mining Profitable. Payouts are made quarterly and are in the relevant cryptocurrency. • Customer Service will help you set up Crypto Currency Wallets. • Mining commences when capacity becomes available. This is usually within a few days, but can be up to 30 days.