There is literally no catch. I just launched this as an offshoot from my main startup, and I have no plans for direct monetizing of Read Across The Aisle. The only way that I benefit is that this app raises awareness for my other startup.

See my response to a sister comment for more details!

But why would the WSJ consent to this? I find it exceedingly hard to believe that they don't get anything in return.

Branding, I think? They also get access to our across-the-aisle user base, so it's possible they're not losing too much revenue with the partnership.

To be honest, I've been surprised at the interest this project had received from major media companies. We actually were almost acquired by a large media company that wanted to build a new brand and put Read Across The Aisle as a central part of it.