Upon registration, I was rewarded with a free grande beverage of my choice. A green tea frap was what I decided on days after I registered my card. The offer was valid for 60 days.
I must remember to treat my Starbucks card as cash as I have loaded it so I could use it in the future and get rewards. What specific rewards? I haven't figured it out yet.
This month, my birth month, I will be treated to a slice of cake together with a purchase of drink. I'm looking forward to it!