Considering the TikTok UI is a clone of 抖音's UI, it's more likely that 小红书 copied 抖音 rather than TikTok. 小红书's primary market has always been China and overseas Chinese, foreigners were an afterthought up until this past week.
He didn’t link to his only revenue-generating project anywhere, so it doesn’t feel like much of a marketing piece to me. It’s just a blog post about what he worked on in 2024 (including hobbies)