Quick TakeFlash lending allows Ethereum users to get capital for any action as long as they return these tokens to the liquidity pool at the end of the transaction.The most beneficial flash loan provider is dYdX, which allows borrowers not to pay a fee for the use of funds.While Aave is most commonly associated with flash loans, it is used less frequently than its competitors and is likely only due to its easy integration.Uniswap v2 flash swaps produced $7.5M fees for liquidity providers due to multiple DeFi attacks.