Buying or selling QQ business card likes (such as the "1 yuan for 100,000 likes" offer you mentioned) violates QQ's official terms of service and carries multiple risks:

1. Account security risks: Most of these services use fake accounts or bot programs to generate likes. Providing your QQ account information (or even just letting third parties operate on your behalf) may lead to account theft, password leakage, or unauthorized use.
2. Account restriction risks: Tencent actively cracks down on artificial data manipulation. Your account may be temporarily restricted, have likes cleared, or even be permanently banned once detected.
3. Scam risks: Many such offers are fraudulent—you may pay but receive no likes at all, or be asked for additional fees under various pretexts.
   Genuine engagement on QQ comes from real interactions with friends or contacts. It’s recommended to avoid such non-compliant services to protect your account safety and legitimate experience. If you have other questions about QQ usage, feel free to ask!