cloud mining means you pay a company for a slice of hashrate. They own and run the machines. You receive payouts under a contract. You do not own a specific miner, and you typically cannot check that the hashrate exists. A dashboard is not proof.
The incentive problem
Mining is a thin-margin business. If renting you hashrate were a reliable profit, the operator would usually be better off mining it themselves. The contract still has to cover their machines, power, staff and profit. Fees, withdrawal rules and the right to cancel when mining stops paying often sit with them.
A documented case
In December 2015 the US Securities and Exchange Commission charged Homero Joshua Garza and his companies GAW Miners and ZenMiner (doing business as ZenCloud). The SEC said that from August to December 2014 they sold "Hashlets" — shares in purported mining power — to more than 10,000 investors, about $20 million worth, and that they sold far more computing power than they actually had. Some payments described as mining returns were, the SEC alleged, funded by money from later buyers. In 2017 a US court entered a default judgment against the two companies.
Hashrate rental
Marketplaces that let you rent hashrate for a period are a close cousin. You still depend on a seller you may never verify, and you still do not own the hardware.
Warning signs
- Guaranteed daily returns, or mining described as risk-free.
- No way to confirm that identifiable machines exist and are pointed at a public mining pool.
- Pressure to pay quickly, especially in bitcoin you cannot easily reclaim.
None of this proves every cloud-mining offer is fraud. It does mean you are trusting a middleman with both your money and the work. That is a weak position in an industry that already runs on thin margins.
Not financial advice.