ICO, IEO, and IDO explained in a few sentences:
An IDO (Initial DEX Offering) is when a token is launched on a decentralized exchange or an on-chain launchpad, and users subscribe directly with their wallets.
During the ICO boom around 2017, many projects raised huge sums with nothing more than a white paper, and many later failed to deliver on their promises.
The entire IDO process takes place on-chain. Before approving anything, verify the webpage and contract address—there are plenty of fake sites.
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This is not investment advice. Don’t follow blindly.