Incentivizing Self-Checkout

We supported a number of experiments with self-checkout.  Including ones that included this idea.
Discussion.

How should self-checkout be incentivized?  by Tom Ryan

In the U.K., Asda’s customers, at least in some situations, have to use the self-service checkout lane if their purchases amount to less than £100 ($130).

The revelation came in a Daily Mail article about a customer vowing to boycott the grocer after she was forced to scan 60 items worth over £120 at one of the Walmart-owned chain’s stores.

In the U.S., it has been suggested that retailers could offer a discount for using self-service, similar to incentives often provided by banks and airlines. But having ample terminals and trained personal nearby to handle any problems to support a hassle-free self-checkout experience appears to be the current way to provide some motivation. ..... "