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.
Some ICO accepting other cryptocurrency than ETH, such Bitcoin, even fiat currency.
Usually they will using dashboard in their platform, so you must register first before contributing.
And they will create some cryptocurrency wallet in your dashboard account to receive other currency like btc, ltc, trx, etc.