The most effective policy to promote recycling is to charge a fee at the time of purchase, as happens with auto batteries and auto tires in California. Use the fee to fund recycling, pay it back when one brings a tire in. This way you pay only once or you fund scavengers who fetch them out of the trash. I scavenged construction sites for pop & beer bottles when I was a kid (the '50s) for the 2 cents' deposit. We're more loss-averse than bonus-incentivized; the increase in volume would make recycling more efficient.