I signed up at coinbase and made a purchase. Their commission was more than 4% though.
Why do the ICOs want us to go via bitcoin? why wouldn't they take credit card payment directly? I'm sure thee-commerce part of a website is standard off the shelf so it can't be offsetting the financial part
Perhaps because they know that you could charge back the amount later if the ICO fails to achieve expected results. Or perhaps they want to be sure the credit card payment is a legitimate one. A fraudulent one would put a dent on their project's funding spreadsheet.
Bitcoin is final and irrevocable which is why they prefer it.