The service you mentioned (0.1 yuan for 10,000 business card likes) typically involves obtaining likes through non-genuine means (such as bots or fake accounts), which carries multiple risks:

1. Violation of platform rules: Most social platforms (e.g., QQ, WeChat, or other apps with "business card" features) explicitly prohibit buying/selling likes. Using such services may lead to account restrictions (e.g., temporary suspension, permanent ban, or removal of违规 likes).
2. Security risks: To deliver likes, some providers may require you to share account credentials or install untrusted third-party tools, which could result in account hacking, personal information leakage, or malware infection.
3. No real value: These likes come from fake accounts and do not contribute to genuine engagement or audience growth. They may even harm your account's credibility in the long run.
   It is recommended to avoid such services. Instead, focus on creating valuable content or building real interactions to gain legitimate likes and followers—this is the sustainable way to grow your online presence. If you have specific needs for promoting your profile, consider using official, compliant promotion channels provided by the platform.