Our analysis shows that the market values for the end-product polymers (LDPE and PP) are the main economic drivers for upcycling infrastructure viability. S-Figure in the SI reports the levels of waste captured for different combinations of market values for the polymers, measured in decrements of 10% from the baseline market values. Figure reports market viability at four sample combinations where the value of both polymers are reduced by the same percentage: total waste captured decreases minimally even with a 20% decrease in polymer values, but this decrease does reduce upcycling profitability. Furthermore, we find that the market value of PP is more critical to upcycling performance, as it is the dominant (valuable) polymer product over LDPE.