If you continued to develop this so your special offers would allow me to do whatever it is (send flowers, etc.) with one click or one reply e-mail, that'd be great.
tl;dr - we'll probably kill them, but thought it would be cool to buy a beer with the proceeds.
As others have suggested, you can monetize with the affiliate ads in the emails that relate to what you're suggesting ("Need flowers? Try FTD.com"). Those ads will bring in higher revenues because they are relevant. AdWords feel really cheap here.
Go long term, all the way.