Will TikTok become like Instagram, where 20 percent of the content consists of advertisements?

Eventually.. Yes

I think it is a good market for B2C marketing, I used it before. But recently as a B2B marketer, I have doubts about it.

I'm pretty sure that more than 20% of content on my Instagram is Ads. 😿 Probably somewhere between 30-45%. (Especially high in stories) I have many times seen two ads back to back. On feed - Ads are often shown on the app's splash screen. They occupy the entire screen and force me to scroll to actually get any content. I really miss the old Instagram. I don't use TikTok, but eventually, Ads are the only viable way to make money off billions of people with the least churn. Thanks to Google for normalizing ads into our lives.