Originally Posted by
WineCountryUA
As of December 2015, you can once again set alerts for saver award inventory on United (specifically fare classes X, I, and O). Here is the thread for reference:
http://www.flyertalk.com/forum/unite...ts-return.html
OP could set an alert for saver space on ExpertFlyer and be alerted when it became available.
EDIT: Looks like the last post beat me to it by 1 minute.