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
I have not seen an ICO project that did not publish a white paper. The most important part of the ICO is the white paper, so without a white paper project, it must be a scam. At least I am absolutely impossible to participate in such an ICO.