A concept first introduced by Gavin Andresen in to promote BTC to a wider audience, it became a precursor to websites where you could exchange BTC for goods and services. We may occasionally use your email address to send you website announcements regarding changes to our website, including improvements, and service or product changes that may affect our website. When collected this information is used by us to improve our website and further enhance the visitor experience and, may be shared with advertisers. Cloud mining will almost never be profitable. Our advertisers may also use cookies on their website.