Do you buy things online? Of course you do. If it didn't cost you any extra, and in fact, you were entitled to extra discounts, would you use a link before you purchased that contributed money to a child's college savings account? There's nothing to sign up for and no personal information disclosed - just you clicking a link before you buy whatever you'd normally buy (and then clicking through merchant links on that website to get to where you'd make your purchase). Please consider using Joey's link if you're so inclined:
Click here for Joey's Upromise "guest" link (It says "Emilie" because the account is in my name since I'm the adult, but it goes to Joey's savings account).