Overall, the sale for Brave’s ethereum-based Basic Attention Token (BAT) generated about $35m and was sold out within blocks, or under 30 seconds. One buyer went so far as to purchase 20,000 ETH (or about $4.7m) worth of tokens – designed to monetize online attention and create a new revenue source for publishers.

Source: $35 Million in 30 Seconds: Token Sale for Internet Browser Brave Sells Out – CoinDesk