I don't see how there is a catch here. She probably realizes that you have something that she can sell to her contacts. She makes a nice commission and you get

I don't see how there is a catch here. She probably realizes that you have something that she can sell to her contacts. She makes a nice commission and you get a customer, both sides benefit. She probably also realizes that she cannot ask you for any upfront money as that will smell like a scam. This is more a sign that she is confident that she will make money thereby making you money as well.