Uniswap has bought back and burned about $28.4 million worth of UNI through its fee mechanism so far this year, according to Castle Labs. Most of the fees used for those buybacks came from Ethereum. Since the fee switch (a mechanism that redirects protocol fees) was turned on, Robinhood Chain has posted notable fee growth and has contributed about $2.26 million in cumulative UNI buybacks. Since late July, Robinhood Chain has accounted for roughly 50% or more of Uniswap's daily UNI burn on most days, with its share nearing 70% on some dates.