Magnet - ebook,audio, and print all free? Strategy question…

I’m a new fiction author - just finishing my reader magnet novella and planning to make the ebook free, in exchange for email. But what about print and audio versions? Make them all free in exchange for email? Or sell the print and audio versions? I’m torn. Having a price on the print/audio would place a value on the free ebook. But am I going to go to Amazon jail or something by offering one product free and charging for another?