Why doesn't Apple mobile phone have an invitation code?

Hello is to ask: "Why doesn't Apple mobile phone have an invitation code for Tik Tok Extreme Edition?" . 1. On the application introduction page of Tik Tok Extreme Edition, click the dark yellow open button.

2. Find and click to activate this item.

3. Then enter the mobile phone number.

4. Fill in the mobile phone number to get the SMS verification code.

5. Click the Make Money button to enter the task page of Tik Tok Extreme Edition.

6. Go to the personal invitation page and click Invite to get the invitation code.