I use this app literally every day, it was absolutely worth the $6 or whatever I paid for it at the time. It's a shame it didn't work out for you financially, but I think this is still a great app.
It really just makes sharing webpages and files totally seamless, but it's not as disruptive as texting, as noisy as facebook or twitter, and it doesn't flood your email inbox. Also, I know exactly who is getting what, it all lives in my Dropbox account, and the file format is totally transparent so I am able to do whatever I want with my data.
I am excited to take a look at the code. A friend and I were actually already working on a simple mobile app because we use this so often--now with access to the code things should go a lot faster.