If the content has an affiliate link box on it you are allowed to share it at will, just be sure to follow this tutorial and share the affiliate link and not just the address bar link so you get credit for the share.
One last tip, there is an affiliate box on everyone's profile page but this affiliate link will only take people who click it to the sign up page, not to your profile.
See below:
Notice the arrow shows my affiliate link for my profile is NOT page specific, in other words it will not bring anyone who clicks it if I share it back to my profile, it will take them to the sign up page.
Thanks for taking this tutorial and if you have any questions or comments please leave them below!
Have fun with this and for more tips in WordPress be sure to go to my profile and check out all of my training tutorials. :)
Shawn>>