Micropayments

[prime]

The net has needed this since 1994 when the conversation began: a way to pay out tiny amounts (starting at one cent) for content, support, or recognition.

Micropayments are small transactions or payments usually of less than a dollar—and, in some cases, only a fraction of a cent—that are mainly made online. Micropayments are seen as a way to leverage the internet to facilitate the immediate distribution of digital rights, royalties, in-game purchases, online tipping, and even to coordinate devices connected via the internet of things (IoT).

https://www.investopedia.com/terms/m/micropayment.asp

Examples
https://crowdbucks.fund/
https://pay.com/
https://stripe.com/