Almost all these ICOs are made on the Ethereum blockchain, there is a standard that almost all ICOs uses which is called ERC20 : https://theethereum.wiki/w/inde

Almost all these ICOs are made on the Ethereum blockchain, there is a standard that almost all ICOs uses which is called ERC20 : https://theethereum.wiki/w/index.php/ERC20_Token_Standard https://theethereum.wiki/w/index.php/ERC20_Token_Standard Exchanges knows how to deal with ERC20 tokens so sometimes theses token hits the exchanges 5mn after the ICO is over (exchange like liqui.io or Bittrex). So no people are not sitting on their ROI since there is liquidity for these tokens