Many　realistic　networks　live　in　the　form　of　multiple　networks,　including　interacting　networks　and　interdependent　networks.　Here　we　study　percolation　properties　of　a　special　kind　of　interacting　networks,　namely　Shopping　and　Cashback　Electronic　Commerce　Networks　(SCECNs).　We　investigate　two　actual　SCECNs　to　extract　their　structural　properties,　and　develop　a　mathematical　framework　based　on　generating　functions　for　analyzing　directed　interacting　networks.　Then　we　derive　the　necessary　and　sufficient　condition　for　the　absence　of　the　system-wide　giant　in-　and　out-　component,　and　propose　arithmetic　to　calculate　the　corresponding　structural　measures　in　the　sub-critical　and　supercritical　regimes.　We　apply　our　mathematical　framework　and　arithmetic　to　those　two　actual　SCECNs　to　observe　its　accuracy,　and　give　some　explanations　on　the　discrepancies.　We　show　those　structural　measures　based　on　our　mathematical　framework　and　arithmetic　are　useful　to　appraise　the　status　of　SCECNs.　We　also　find　that　the　supercritical　regime　of　the　whole　network　is　maintained　mainly　by　hyperlinks　between　different　kinds　of　websites,　while　those　hyperlinks　between　the　same　kinds　of　websites　can　only　enlarge　the　sizes　of　in-components　and　out-components.　(c)　2013　Elsevier　B.V.　All　rights　reserved.