TikTok’s own ad spending, to drive downloads of the app, jumped to as much as $3 million a day in the U.S., a person familiar with the matter said.
In October 2017, Mr. Spiegel, Snap’s chief executive, met with Bytedance in China, where he was impressed with how Toutiao served people content based on what they had clicked in the past, rather than friends’ recommendations—a strategy common on Facebook that had been rejected by Snap, people familiar with the visit said. He ordered staff to redesign Snap’s app using more AI to order content, in part based on ideas from Bytedance, but glitchy technology caused it to flop with users.