Personally , I don't think there should be an ICO without whitepaper. The whitepaper bridges the gap between an investor and a company. Can we say a ICO without a whitepaper is a scam? Or what can you say about an ICO without whitepaper
The most important in one ICO is the whitepaper without it the ICO is weak because whitepaper is the only way to fully understand the project, without it for sure nothing will invest, when making a ico make sure to create a whitepaper because its the foundation of a project.