I had a job offer from an IBM company once. The offer negotiation part happened directly with IBM. The salary went to hell because I live in Canada, and although the position was fully remote, they took away the juicy US salary and offered me a sucky Canadian one. The main reason I work remote is to not get stuck with a Canadian salary. In addition they stated that everything I do at any time is owned by them. I had a side project, so I applied for an exemption. It went through legal for a couple weeks. It was denied.

I turned the job down. The whole process wasted tons of my time and theirs and could have been avoided if they had just been upfront about their policies instead of writing useless crap about how great their culture is in the job ad.