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
Without white paper there can be no working draft. All information about the roadmap, team, etc. is in white paper. I don't advise you to invest in a project where there is no white paper, I also don't advise you to participate in the bounty program of such a project.