Using services to artificially increase Douyin double-clicks (likes) violates Douyin's Community Guidelines and Terms of Service. Such actions can lead to severe consequences for your account, including temporary restrictions or permanent suspension. Additionally, many "cheap brushing" websites are fraudulent—they may fail to deliver the promised services, steal your personal information, or charge hidden fees. To grow your account in a legitimate and sustainable way, focus on:

1. Creating high-quality, original content that aligns with your audience's interests.
2. Actively engaging with followers (responding to comments, participating in trends).
3. Using Douyin's official promotion tools (e.g., Douyin Ads) if you want to boost visibility through authorized channels.
   This approach not only protects your account but also helps build a genuine, loyal following. Please avoid using unauthorized third-party services to ensure your account's safety.