Swindlers use this term (arbitrage fraud) as a process that enables a person to obtain a Self-Liquidating Loan (money to buy equipment or investments to generate back what's owed), http://www.fraudaid.com/dictionary-of-financial-scam-terms/arbitrage.htm  

$1,000,000 of pre-orders at BTC $10, later BTC rises to $16, I refund you back in $ cost of item, $1,000,000 refund for you and $600,000 for me.  

I'm not suggesting that's what's going on here, just how you could obtain free funding for a FPGA farm.