According to ChainCatcher, the cumulative front-end fees of Uniswap Labs, the development company behind the Uniswap protocol, have exceeded the $50 million mark, according to The Block. Last October, the protocol charged a 0.15% fee on user transactions on its web interface and wallet application, and the fee went directly to Uniswap Labs. In mid-April, Uniswap Labs raised its interface fee from 0.15% to 0.25%.