You should have not changed the license. All rights reserved gives you all the power and owner shipping. To give other license means they can dilute your work.
There *is* a middle ground between 100% proprietary and 100% free-of-all-monetary-value-and-distribution-control (GPL). MIT is more in the middle and way off in the Z-Axis of Absolute Freedom. I, personally, prefer Creative Commons Attribution (which requires them to keep my copyright notices and say their works are derived from mine in a very public place (like about pages and splash screens).
I also combine it with the OSSAL, which forbids usage of my code in GPL'd projects. I will NOT contribute to GPL, and will not allow my apps to be infected. OSSAL is the GPL vaccine.
Thank you for a healthy reminder to anyone in the open-source community; and please don't get discouraged by the extreme stupidity of previous comments.