# Facebook, Twitter, Telegram, Tencent

## Bright Side

1. **Facebook, Twitter, Tencent:** Advertisement. Some people pay those company money to display their Advertisement Content to users. (Sometimes, they even use their platform to promote their own other products.)
2. **Twitter, Telegram, Tencent:** Paid Users (VIP). Some platform or application functions or features only paid user can use. For example, no advertisement.

## Dark Side

1. Some of those company do not allow third-party to make automated bot, but they secretly create bot themselves. So it seems like there are a bounch of people, but actually they are all bot. By using those bots, they can do a lot of things, for example, promotes ideas, control society's thinking, sell some products, anything and everything.
2. Use users data for personal usage. For example, see what is happening in the society by using big data. Use user data to train chat AI.
3. Steal user's intelegence. For example, business idea, business secret and so on.
4. Spy on users, do 1984 society control.
