It is spend $25 and get $25 credit.
The link on Facebook will take you to AMEX to register - you don't actually have to register on Facebook. (They are just promoting it on Facebook.)
Or, if you log into your own AMEX Acct. - you will see the same link there.
Ah hah! Thank you. I like facebook but the privacy thing kinda wigs me out, even if it's just a direction to a link. I'll log in to Am Ex instead.
Free sushi, here we come!