Software as a service (SaaS) featuring temporary use of non-downloadable software allowing e-commerce merchants to create, automate, manage, and customize sales promotions and marketing campaigns across multiple sales channels; providing temporary use of online non-downloadable software for configuring and optimizing sales promotions and marketing campaigns by tracking performance with reports and analytics, and receiving strategy suggestions to improve customer engagement and increase revenue; software as a service (SaaS) services for customizing promotion styles on online stores to enhance customer experience and drive merchant revenue; providing temporary use of non-downloadable computer e-commerce software to allow users to perform electronic business transactions via global computer network.