Using third-party websites to "刷" (boost) QQ or Douyin services (such as followers, likes, views, etc.) is an unauthorized practice that violates the terms of service of both platforms. This behavior carries multiple risks:

1. Account penalties: Platforms like Tencent (QQ) and ByteDance (Douyin) have strict anti-cheating mechanisms. Using such services may lead to account restrictions, temporary bans, or permanent suspension.
2. Security threats: Many of these "lowest-priced" websites are scams. They may steal your account credentials (QQ password, Douyin login info) or trick you into paying without delivering the promised services.
3. Financial loss: Even if some sites seem to work temporarily, they often require repeated payments to maintain the boosted metrics, and there’s no guarantee of refund if something goes wrong.
   To grow your QQ or Douyin presence legitimately, focus on creating high-quality content, interacting with your audience, and using official promotion tools (if needed) provided by the platforms. This is the only sustainable way to build a real and engaged following.
   Please avoid using any unauthorized third-party services to protect your account and personal interests.