Using services to刷赞 (buy likes) for QQ Space posts violates Tencent's (QQ's operator) terms of service and carries multiple risks:

1. Account Penalty: QQ’s anti-cheating system can detect abnormal like activity. Your account may face restrictions (e.g., temporary suspension, loss of post visibility) or even permanent ban.
2. Security Threats: Most such websites require you to enter QQ account credentials or grant unauthorized access, which can lead to account theft, personal information leakage, or malicious use of your account (e.g., sending spam).
3. Fraud Risk: Many "刷赞" services are scams—they may take your payment but fail to deliver likes, or use low-quality bots that get removed quickly, making your investment worthless.
   To protect your account and comply with platform rules, it’s recommended to gain likes organically by creating valuable, engaging content. If you encounter account issues, contact QQ official customer service directly. Avoid trusting or using any third-party "刷赞" services.