I knew it before. They have a completely centralized platform with their name starting with D. From their no beneficiary taken and guest account feature, I thought that they will be taking some serious measures to break from steem and have separated platform of their own. But I didn't think they will go to another blockchain. Thank god I was using both DTube and DLive to post videos, now that I don't have to upload my video twice and can stick with the open source platform without worrying about which is better.