Holy ancient thread, Batman!
If you had waited another 9 months you could've hit a decade between posts.
You say you joined erewards "quite some time ago." Was it over a year ago? Because e-rewards requires you to spend "all" your "currency" before your anniversary date (+ 30 days I believe).
Email them and as a one time courtesy they may reinstate your points.
Good luck and welcome to Flyertalk.