Many argue that mental and psychological costs of evaluating each payment necessarily make microtransaction economies impractical; I disagree. Seems more like a UX/culture challenge. eg. drivers don't spend much time thinking about how much gas they consume second by second.
This is literally what Amazon solved with Prime. This is an excellent though slightly orthogonal discussion of how they avoided being bottlenecked by shipping fee aversion using Prime.http://www.eugenewei.com/blog/2018/5/21/invisible-asymptotes …