#29unit 2e commerce payment system
Digital Accumulating balance payment system
Accumulating small charges into a single debit.
Pay-per-article news subscription
A reader pays 25 cents per article read; the system records each read in an account and at the end of the month debits the card once for the total — say $9.75 — instead of running 39 separate card transactions.
Ride-sharing tolls, in-app game purchases, and metered news subscriptions use accumulating balances.