I am wondering some ICO's accept only ETH. Some accepts BTC, ETH, LTC and other cryptocurrencies as well. Does accepting more currencies in ICO plays a roles in its success.
Also Ethereum's smart contract are built for accepting only ETH. How other ICO's are accepting multiple cryptocurrencies and pays tokens accordingly? Do they have to maintain a sheet of who pays in what currencies in a sheet and allocate tokens accordingly. It seems to be a hard manual process.
I know a lot of ICOs based on the ETH blockchain platform, but they still accept other types of coins like BTC and EOS. For ICO, I think the project team only wants to receive large popular coins, it can help them avoid unnecessary mistakes.