Wholesale sites may want all new customers to be in a non-zero
customer level. To set that up, simply set the DefaultCustomerLevelID AppConfig to the ID of the customer level you wish customers to be assigned to by default.
The level you set DefaultCustomerLevelID to will essentially be a 'new registrant' level which will not see pricing yet, and your managed levels (all other non-zero levels) will be your Wholesaler levels which you assign manually to the new registrants.