My objectives are a bit cleaner, as I have no motivation to sell anything. I want more kids and adults to get into yoyo. Get off the sofa, get moving.
I should be clear that I don't make any money off these sales. All the proceeds go to the school's parent organization.
I share Studio 42's goal, which he expressed well.
I'll add as well that there is a deep sense of satisfaction that comes with building a physical skill. Even if you're frustrated with a trick--no, especially if you're frustrated with a trick, working on it until you get it gives you something that no passive entertainment ever can. Don't give up!