https://signals.tw/articles/fiverr-upwork-catalog-eaten-first/ 矽基前沿 [Si]gnals zh-tw 2026-10-03T17:53:32.343Z Fiverr 對 Upwork：一鍵下單的接案先被 AI 接走 https://signals.tw/articles/chegg-chatgpt-died-at-the-front-door/ 矽基前沿 [Si]gnals zh-tw 2026-10-02T17:48:03.641Z Chegg 留存一直很好，AI 先搶走的是門口的新客