The kind of service you mentioned (QQ likes at extremely low prices like 0.1 yuan for 1000) is not legitimate and carries significant risks:

1. Violation of QQ's Terms of Service: Using third-party services to artificially increase likes is against QQ's rules. This may result in account restrictions (e.g., temporary bans, removal of fake likes) or even permanent account closure.
2. Account Security Risks: Most such services require you to provide QQ account credentials or authorize suspicious third-party apps, which could lead to your account being stolen, leaked, or used for malicious activities.
3. Scam Risks: Many low-priced like services are scams—they may take your money but fail to deliver the promised likes, or disappear after receiving payment.
4. No Real Value: The likes from these services are usually from fake accounts or bots, which do not contribute to genuine interaction or meaningful growth of your account.
   For a healthy and sustainable QQ account, it’s recommended to gain likes organically by creating high-quality content, interacting positively with others, and building real connections with users. Avoid relying on any unauthorized third-party services. If you encounter such services, it’s best to report them to QQ official channels.