Hyper Cache plugin works just fine with EDD, even on Multisite, if you add these URIs to the
Hyper Cache Options -> Filters section -> URI to reject:
/downloads /downloads/ /checkout /checkout/ /purchase-confirmation /purchase-confirmation/
Variation: If you change the default pages for options 2, 3, and 4 in Downloads -> Settings -> General, then edit the URIs above to reflect that.
