Hashlet

"Hashlet" was the brand name for a Bitcoin cloud-mining product sold by GAW Miners in 2014. It's also one of the more notorious scams in Bitcoin's history, and a useful cautionary tale about how to lose money in Bitcoin without losing any actual private keys.

The pitch:

• GAW Miners (founded by Josh Garza) sold "Hashlets" - supposed fractional ownership shares in their mining operation.
• Each Hashlet was advertised as giving you a portion of GAW's hash rate, with daily payouts.
• The product launched in August 2014; tens of thousands of Hashlets were sold for over $10 million total revenue.

The problem:

• The mining hardware GAW claimed to operate didn't exist at the scale they claimed, or at all.
• The "payouts" were made by paying earlier investors with later investors' funds. Classic Ponzi structure.
• GAW also launched "Paycoin" (XPY), an associated cryptocurrency Garza promised would be backed by a "Coin Vault" of $100M. The vault didn't exist. Paycoin collapsed from a peak of $14 to near-zero within months.

The aftermath:

• The SEC charged Garza with securities fraud in 2015.
• In 2018, Garza pled guilty to wire fraud and was sentenced to 21 months in federal prison plus $9.1M in restitution.
• Most Hashlet "investors" lost most of their money. Recoveries were partial at best.

Why this matters as a glossary entry, not just a footnote:

• Cloud mining as a category is dominated by scams. Hashlet is the canonical Bitcoin-context version of what altcoin markets call a rug pull - sell shares or tokens backed by something that doesn't exist, pay early investors with new funds, vanish when new investment slows. HashOcean, BitClub Network, Mining Capital Coin, USI-Tech, and many others followed similar patterns through the late 2010s.
• The pattern is consistent. Promise yield on hash rate you can't independently verify. Pay early investors with new investor funds. Collapse when new investment slows.
• Legitimate cloud mining exists (NiceHash hash-rate marketplace, some hosted-miner services), but it's a niche market, not the "passive income mining" pitched by scams.

For modern self-custody Bitcoiners the takeaway is structural: if a yield product can't show you the real hardware producing the hash, doesn't let you verify the on-chain payouts trace to actual block rewards, and pays "too good to be true" returns, it's almost certainly a Hashlet-style scam. The honest forms of Bitcoin mining exposure are buying ASICs and electricity yourself, or buying mining-company equity through normal capital markets. Everything in between has a poor track record.