After a decade and a half in the F500 world, I now work for a much smaller, venture-backed company. We really don't have any policies insofar as class of service, but as my bonus is directly linked to my budget, I'm pretty vigilant about booking Y, unless a cheap A fare pops up, which they do from time to time. Fortunately, all of my flights are short now, 6 hours max, so it doesn't matter as much as when I was consistently shuttling to BNE or LHR in years past.