Using third-party services to buy QQ business card likes (名片赞) violates Tencent's QQ User Agreement and poses multiple risks to your account and personal information:

1. Account Security Risks: Most such websites require you to provide QQ account credentials (e.g., password) or authorize login through untrusted channels, which may lead to account theft, password leakage, or unauthorized use of your account.
2. Account Restrictions: Tencent actively detects non-genuine interaction behaviors. Your account may face penalties like temporary suspension, removal of purchased likes, or even permanent ban.
3. Scam Risks: Many of these services are scams—they may take your money but fail to deliver the promised likes, or trick you into paying additional fees.
4. Malware Threats: Some unregulated websites may contain malicious code that infects your device with viruses or steals your personal data.
   To increase genuine engagement on your QQ profile, it’s recommended to:

• Interact actively with friends (e.g., chat, comment on their updates).
• Share interesting, positive content on your QQ space or profile.
• Participate in QQ groups or communities related to your interests to expand your social circle.
  Please prioritize the security of your account and comply with platform rules. Avoid using any non-official or untrusted services.