Oracle is a big player in ad tech. Some of its notable acquisitions are Datalogix, Moat. TikTok has a pretty good algorithm for figuring what content you like. Unlike fb and ig you don't even need to have a account to use tiktok.
And btw TikTok said they are not willing to sell their "algorithm". https://www.zdnet.com/article/bytedance-wont-allow-tiktoks-a...
https://www.scmp.com/economy/china-economy/article/3101362/t...