Pacman based billing
｢ Salesforce started out charging $2 per “conversation” for its customer relations bot Agentforce. But that elicited grumbles from customers. So now it offers a smorgasbord of options, including pricing based on “actions” such as updating a record or summarising a case. Users can buy credits up front, get billed in arrears or pay a fixed fee for unmetered use ｣
https://www.ft.com/content/8784de75-861f-4460-b8c3-6937f626dbd1