Odaily Planet Daily News Web3 startup Spindl announced the launch of an on-chain advertising network. Founded by Silicon Valley veteran Antonio Garcia Martinez, the company connects advertisers, publishers, and so-called attribution providers that track customer sources. In this case, "publishers" are providers of crypto wallets, which are increasingly similar to social applications, with news feeds and "discovery" tabs. The delivery of advertising content will still be done off-chain, but advertisers will transfer funds for advertising campaigns to smart contracts, and only when the attribution provider verifies that the advertisement has led to sales by reviewing on-chain data will the smart contract release the funds to the publisher. (Coindesk)