Interesting. I've always asked, too, and 0% were willing to make any changes to their policies. I suppose it has a lot to do with the size of the company and your relative bargaining power.

Probably cultural norms and location play a huge role here, I'm in a nordic country and feel like trust is generally high and people are reasonable.

My bargaining power is not that high and managed to do this from tiny companies to global corporates.