Dade Hayes editorTikTok, the rapaciously growing social media platform controlled by ByteDance, disclosed the size and surge of its user base for the first time in a lawsuit filed Monday against President Donald Trump.Privately held ByteDance, founded by Chinese internet entrepreneur Zhang Yiming, revealed it has 100 million monthly active users, up from 91.9 million in June and more than double the 39.9 million of last October.