Nice! Couple of ideas: 1) install basic advertising via AdSense. 4.5mm visitors will monetize 2) affiliate link to a useful, paid product that your users cou

Nice! Couple of ideas: 1) install basic advertising via AdSense. 4.5mm visitors will monetize 2) affiliate link to a useful, paid product that your users could also use. If they click through the link and buy, you are paid a commission. 3) limit the # of API requests. Charge $X/mo for more than Y requests. Offer an unlimited plan for a higher price.