I have been read about this idea and trying out this service called RevResponse. Programs that pays you to give away free magazines, white papers, podcasts, webinars, etc. In order to publicize this program they offer all its partners a $50 bonus just for mentioning the program on their blogs or websites. This kind of publicity is nothing new and we usually ignore, but there are nothing to lose, so why not to give attention to this.
We also get the referral bonus when promote like they say:
you will be paid 20% of the earnings that your referral partners generate for the first 6 months of their partnership!
I decided to post this, is not just sign up for some free subscriptions, but this is alert for you the fact that you can make $50 by promoting this on your own sites.