Depends on how badly the company needs your individual business, and/or how much you want their services, since they're under no obligation to accept or even review your proposed amendments. I suspect very few companies would have an incentive to take them seriously.

We get fairly routine requests from state universities and similar institutions who want us to fill out various forms, agree to supplemental terms, or alter our EULA for their special cases. Labor and legal costs would mean we'd lose money on lots of those sales, so we just respond with a blanket "sorry, we can't do that, good luck to ya" type message. The customer is then free to go about their lives without our software, or (more often) find some way to agree to the EULA as-is after all.