There are 2 account types. Personal or Company.
This account is for individuals such as your employees to receive personal payments and to transfer them out to their bank, PayPal, Gift Card or Digital VISA Card. More Info on a personal account
This account is for companies wanting to run a payments program or companies receiving 'company direct' payments from another company. If you create a company account it will require approval and you will be the master admin for that company account. The master admin can login and review transactions and reports plus run payment programs and more. More Info
For both types of account, emails must be unique. It is possible to have both account types, ie personal and company. This is usually required if you personally receive rewards (personal account) and also you are a designated admin for your company (company account). You can use the same email for both accounts, and even the same password. If use use the same email and password for both accounts you will be promoted as to which account you are trying to login to.