I just learned e-certs are not able to be combined, and did some keyword searching of the UA board here on FT to see if this angle has come up and could not find--or threads are very old and I fear not relevant...so I think it deserves its own thread:

When given the option for compensation (for whatever reason), what form of comp do you choose in order of preference and why? Based on what I have learned so far, it seems to me the most-to- least advantageous prioritization would be

1. Cash
2. Points (so that you can use however you want, in the amount you want)
3. E-cert / voucher (restricted by quantity/pax - never been issued one so dunno if they expire?)
4. Credits (any credits I've ever been issued I have never used, would have had to pay $150 to use--not so relevant if the fare in question is <$150), and they expire in a year.

Have I missed any comp type?
What are your thoughts on the order of preference?

And lastly, is there a technical difference between an 'e-cert' and a 'voucher', or are those just terms being used interchangeably here on FT? I searched UA.com and could not find but it seems there might be a difference from some of the headers/threads I reviewed.

TIA!