Originally Posted by IluvSQ

Only use I can see is if you had your girlfriend nominated, broke up with her, then
your new girlfriend sees the ex's name and asks why are you still upgrading her?

Or, if you're married, but u/g your mistress, but do not want a permanent
record available for your wife to see..., you can nominate her, upgrade her,
then deactivate after the transaction is done.