1. A method executable by a computer having a processor and a computer-readable memory, comprising executing by the processor, software code stored in the computer-readable memory to configure the computer to perform steps, comprising: retrieving through a communication interface of the computer, dwell time information for users that engage advertisements streamed to the users in a display content stream; in response to the retrieved dwell time information of the engaged advertisements, aggregating by the executed software code, using the processor, the advertisements into different groups of different display and online advertisement campaign contexts comprising: advertisement category, device on which the advertisement is viewed, and product in which the advertisement is streamed; computing, using the processor, short-click ratios of advertisements in each group based on a short-click threshold assigned to the group and the user dwell time information for the group; determining, using the processor, average dwell time by users on advertisements in respective groups; adjusting, using the processor, pricing of the advertisements of a group for bidding in a non-guaranteed delivery (“NGD”) auction based on the short-click ratio and the average dwell time of the group, such as to favor groups having higher dwell times and lower short-click ratios; and transmitting through the communication interface of the computer to a content exchange network, the adjusted pricing of the advertisements of the group to an NGD exchange server for participation in an NGD auction, wherein the NGD exchange server is configured to conduct real-time auctions with the advertisements.