It's a false perk as cannot take unlimited PTO in any professional job and expect to remain employed and on the payroll (esp if you are paid well). Being a finance guy, this is an acctg. play to remove liability off the books (funding requirements as a liability, but never have to pay out for salary employees).
Should never be a factor in accepting a role/opportunity other than clarifying if there are enough available times within a calendar year to get some time off (and trying to inquire with any current employees on vacation time perspectives).
Have worked at several top 100 corporations and PTO 'banking' is being slowly extinguished (exceptions are those states that have laws or a foreign based corp., but have seen a couple companies start removing operations from said states with said laws).
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Play for the name on the front of your jersey, not the back...