“…, m n contribute user utility (Kuo and Liao, 2007;Merayo et al, 2017) indicating goal-satisfaction. Further research on current internet pricing schemes has involved other utility functions that are often used such as the original Cobb-Douglas utility function (Puspita et al, 2020b;Sitepu et al, 2017b), quasi-linear, perfect substitute (Sitepu et al, 2017a) , and bandwidth function (Guan et al, 2008;Indrawati et al, 2015;Zu-Xin et al, 2009;Moriya et al, 2005) utilized in three types of information service pricing systems, namely at-fee, usage-based and two-part tari (Gizelis and Vergados, 2010;Puspita et al, 2020a;Puspita et al, 2021) both analytically and as MINLP (Mixed Integer Nonlinear Programming) (Barrios and Cruz, 2017;Giraldo, 2017) with the help of LINGO (Cunningham and Schrage, 2004;Schrage, 2009) application software. The perfect substitute utility function was one important utility function to be selected to measure the satisfaction of the customers due to its linearity.…”