A cost-per-second (CPS) based technology for Internet advertising is introduced. In one embodiment, the systems and methods described herein improve efficiency and efficacy of Internet based advertisements. Efficiency is improved by making advertisements relevant to the user; decreasing loss or waste in advertisement space and opportunity for the publisher; and displaying advertisements only for an appropriate duration and being charged according to actual duration for the advertiser. In embodiments, the cost for a certain branding effect can be measured and used with higher accuracy. In embodiments where multiple advertisements are shown simultaneously or at various timings, the technology introduced here provides unique bidding models to allow an advertiser to bid for advertising space, of an advertisement display. The bidding models incorporate bidding based on CPS, a function of CPS and cost-plus-click, effective CPS, etc. Conversion models for comparing advertising schema using traditional and newly introduced models are also disclosed.