Services claiming to offer a large number of QQ postcard likes at an extremely low price (like 100,000 likes for 1 yuan) are not recommended for several important reasons:

1. Violation of platform rules: Buying fake likes goes against QQ's Terms of Service. Your account may face penalties such as temporary restrictions, removal of fake likes, or even permanent suspension.
2. Scam risks: Most such services are fraudulent. You might pay money but receive no likes at all, or the likes could come from fake accounts that disappear quickly. Some services may also ask for your account credentials, leading to account theft or privacy leaks.
3. No real value: Fake likes do not reflect genuine engagement. They won’t help you build real connections or get meaningful interactions with other users.
   If you want more likes on your QQ postcards, focus on creating interesting, high-quality content and actively interacting with friends or communities—this way, you’ll get authentic likes that have real value. Stay away from any unauthorized third-party services to protect your account security!