Digi Offering 365 Days Validity for RM100 Top Up?

I switched my Maxis Post-Paid Plan over to Digi Prepaid early this month as I would not be making many calls from now on. I bought a RM100 Digi Reload Slip with my Amex Card from Tesco Hypermarket hoping that I would get Amex 8x MR Points.

Upon activating the reload, I was pleasantly surprised to have been given 365 days validity for a RM100 Top Up. I wasn't very sure if this promotion applied to all RM100 Top Up or exclusively for new customers/customers who switched over.