It is true that the DeFi activity on Tezos is not enough to make money off fees, as the market capitalization of Tezos is relatively low compared to other blockchains. However, there are still some ways to make money from the DeFi activity on Tezos. For instance, users can earn passive income by staking their tokens in various DeFi protocols. Additionally, users can also take advantage of arbitrage opportunities and provide liquidity to earn fees. While the fees may not be as high as other blockchains, the low market capitalization of Tezos means that the fees can still be quite lucrative. Therefore, while the DeFi activity on Tezos may not be enough to make money off fees, it is still possible to generate some income from it.