Arcblock - that one is known to us. We were invited into their ICO presale stage but we gave ii up. Why? Their White Paper looked simply unreal - it was almost impossible to achieve. And their team at that moment was not impressive at all. Also, we saw many red flags there, like fake partnerships, some plagiarism etc. Basically, it was a money grab attempt to us. But this is crypto and this project was very much hyped by shillers on YT and other media. They passed ICO stage and now are traded on exchanges. Do not get me wrong - it is possible to make good gains on this one but rather on speculation now than on strong fundamentals. Unfortunately, most of ICOs are later quiet exit scams (after a year or so) and only the ones with a good idea, good token economics and strong team may survive. I hope that helped ;)