I applied for freelance work once for some sort of tech Q&A platform. It was basically answering people's one-off questions, like "how do I change my screen res

I applied for freelance work once for some sort of tech Q&A platform. It was basically answering people's one-off questions, like "how do I change my screen resolution on Windows 10" or whatever. They asked me to sign a contract with a clause saying that I'd assign them any inventions I came up with in the course of my work, sign anything reasonably related to them pursuing patents for these inventions and grant them power of attorney to do so on my behalf if I didn't do so promptly. (There was a separate copyright clause that was itself reasonable). I pointed out that the work wouldn't result in any inventions and that I couldn't possibly agree to sign future agreements or assign even limited power of attorney to them. They seemed genuinely confused at why I was objecting and wouldn't budge.