When Leanne Owens was first bombarded with ads for something called TEMU on her Facebook feed, she wasn't sure if it was a scam. The 64-year-old teacher and farmer looked up the Chinese e-commerce platform online, and was immediately intrigued by the wide range of products at dramatically low prices. Owens ordered some pet supplies and small toys for her grandchildren, which cost her $58. Eight business days later, her order arrived at her home in the rural Queensland town of Grandchester. "Everything was top quality, I was very impressed," she said. What further surprised her was an email from…