By sharing your contact information, you agree to receive periodic communications. You can remove yourself at any time from my contact list and your contact details will not be disclosed to third parties EVER. Unless many years go by and they offer an ungodly amount of money, but thats not likely at all.
Regardless, if at some point I have millions of contacts and it even becomes a possibility in my mind, I will contact you first to offer to opt into third party disclosure. I have always valued relationships over money, and I don't foresee that will changing in the future.