Just checked the Engenie website and it does finally say that you have to pay.
"Follow these on-screen instructions at the charger to charge your car.
You can pay easily by contactless credit/debit card or ApplePay tap-and-go.
Currently an Engenie charge costs a £4 flat rate. This is just for a few months before we introduce our PAYG tariff, where you’ll only pay for what you use, in kWh."
The free lunch is over.
"Follow these on-screen instructions at the charger to charge your car.
You can pay easily by contactless credit/debit card or ApplePay tap-and-go.
Currently an Engenie charge costs a £4 flat rate. This is just for a few months before we introduce our PAYG tariff, where you’ll only pay for what you use, in kWh."
The free lunch is over.