极客时间618大促：通过特定邀请链接购买课程享5折及官方返现
英文摘要
A V2EX promotional post details a GeekTime 618 sale offering discounts and cashback on courses. Users must purchase via an affiliate link at coursesub.top, not the official app, to receive cashback through WeChat refunds after adding a specified contact. The post also runs a lottery for a free course under ¥200. This is a commercial ad, not AI industry news or research.
中文摘要
一则V2EX推广帖宣传极客时间618大促，课程最低5折并通过特定邀请链接购买后可获微信返现，需联系指定微信领取。帖子还包含盖楼抽奖送课。此内容为商业广告，非AI行业新闻或研究。
关键要点
Promotional post for GeekTime 618 sale with discounts up to 50% and cashback.
极客时间618大促推广，课程最低5折，另有返现。
Cashback requires purchasing through an affiliate link (coursesub.top) and contacting WeChat.
返现需通过特定邀请链接购买，并添加指定微信领取。
Includes a lottery where participants can win a free course valued under ¥200.
包含盖楼抽奖活动，赠送原价200元以下课程。