Buying likes or engagement on QQ (such as "1 yuan for 100 likes") violates QQ's official terms of service and carries multiple risks:

1. Account security risks: Most such platforms require you to provide QQ account credentials (like passwords or verification codes), which may lead to account theft, unauthorized access, or personal information leakage.
2. Account penalty risks: QQ strictly cracks down on fake engagement behaviors. Your account may be restricted (e.g., limited posting, hidden content) or even permanently banned once detected.
3. Scam risks: Many "low-cost like" services are scams—they may take your money but fail to deliver likes, or provide low-quality fake likes that are quickly removed by the platform.
   Genuine engagement comes from creating valuable content, interacting with real users, and building authentic connections. This is the only sustainable way to grow your QQ presence while protecting your account safety. It is recommended to avoid any illegal or unethical engagement-buying behaviors.