Sort of. I've done affiliate stuff before but I don't like the vibe it gives off. Selling the products directly in a more publisher-esque way feels more honest, although I'm not entirely sure why.
I bet you could significantly increase your revenue by working directly with authors—though if you try to republish their books it would be more work for them.
Just work with one author a month, whose book you have carefully vetted, and promote it to your lists for a commission.