Using "free QQ profile card brushing" services is not recommended, as it involves multiple risks and violates QQ's platform rules:

1. Violation of platform terms: QQ strictly prohibits the use of automated tools, third-party services, or other non-genuine means to artificially increase profile card views, likes, or other data. Once detected, your account may face penalties such as restrictions, temporary suspension, or even permanent ban.
2. Security risks: Most such "free" services require you to provide QQ account credentials (like password) or click on suspicious links. This may lead to account theft, personal information leakage, or malware infection on your device.
3. Scam risks: Some services claim to be free but later demand payment to unlock full features, or trick you into participating in illegal activities (e.g., spreading spam) to "earn" brushing credits. If you want to increase interaction on your QQ profile, it’s better to use legitimate methods: interact actively with friends, share interesting content, or join communities with similar interests—this way, you can get genuine attention while keeping your account safe. Please use QQ in compliance with platform rules to protect your account security.