I got a similar email that said:

"Update your Member Profile—and we'll update your currency.

Perhaps you were not aware of this program rule. So we're offering to extend the expiration date of the e-Rewards currency you earned prior to January 1, 2003 until March 31, 2004. All you need to do is click here to update your profile by June 28, 2003. By updating your profile now, you'll have additional time to build your account balance and reach your next reward level."