Thanks for the response, Dexter.
I have some good news for you
playmeforafool.
https://accounts.usenetserver.com/register/chooseplan?promo=oh-say-can-you-save-on-usenet&_ga=2.115408773.2095382456.1594160740-665152286.1594160740 still has the deal which is
12+5 months for $3.99.
I wrote to UNS support yesterday and said I would rather have this promotion than migrate to the higher rate that I was on and they responded today with the news that they will honour the deal for me. I guess I was lucky because my old contract was due to renew today.
I believe the deal runs from 2nd - to 9th. Good Luck!
UPDATE: Dexter's link above takes me nowhere and my link takes me to a page that says I am not eligible (presumably because I now a "paid up member"). Consider opening a ticket with UNS support stating what you hope to achieve and that you are aware of the time constraints and they should respond within 12-24 hours.