Companies with less than 20 employees aren't federally required to offer COBRA. Companies larger than that are required to offer at least 18 months of coverage. I don't know how large your old company was, but Coinbase is large enough that this offer, rather than being generous, sounds illegal? https://www.dol.gov/sites/dolgov/files/ebsa/about-ebsa/our-a...

i assure you they don't do that to be generous, they do it to get you to sign a piece of paper which reduces their legal risk profile