No, these are one of those deals where you get a referral fee if someone joins under your link. https://transferwise.com/help/21/inviting-friends/2487043/how-does-your-invite-program-work Uber has done this in the US and many US credit cards have similar referral programs. Most of the frequent traveler websites work this way. Here is a disclaimer from one of those sites: I receive compensation for content and many links on this blog. You don’t have to use these links, but I am grateful to you if you do. I'm see nothing wrong with this, helping someone and helping yourself.