I like that simple pricing model. $10 if you like it after 2 weeks, free if you refer 2 people. Guessing it was honor system, curious how well it worked.
Yep, I kept it simple. But, it wasn't the honor system. It required you to make an account, and then pay with PayPal. Then it required you to activate the program by entering your username and password, and sending a request to the server: http://tabbed.org/register.php
Could you spin up two other machines with different email accounts, and refer the program twice to yourself? This trick worked (and possibly still works) for getting free Dropbox storage.
It’s not a referral of the referred accounts don’t pay