There is an option in the system to enable the minimum chat balance. It means that the customer has to pay this amount to enter the chat and after this amount is spent, they will be charged per minute
This feature works like this:
Set up the minimum balance (for example 10 credits)
Set up the min or default price (for example 2 credits)
Once a customer enters the chat, they will be warned and then 10 credits will be taken from start. Since the price is the 2 credits/minute, the pay per minute charging will be taken after 5 minutes of chat
To enable this feature please create a request in the support.scrile.com