No. We don't share your personal information (your name, your email address) with anyone, including the merchants you shop with, without your explicit permission. For example, we will enroll your email in the mailing list of a merchant only if you go to the merchant screen in the app, click "More" and then subscribe to their mailing list. We do allow merchants to target offers to you based on your profile (for example, Birthday rewards on your birthday, VIP rewards if you are a top spender, etc).
For branded apps powered by Thanx
When you sign up for a Thanx-powered app we will share your email address and transaction data with that merchant (and ONLY that merchant).