Can campaign creators connect their Stripe account as a Business or Individual?
When you are using marketplace mode (direct transactions OFF located in the payment settings) then your campaign creators will be forced to connect a Stripe account to the campaign.
Campaign creators can be either individuals, or businesses, it does not matter. As you can see from the below screenshot, this is the form that the campaign creators will need to fill out to connect the Stripe account:

From the type of business section of the form, you can choose to be an individual or an organization from the dropdown menu.
Make sure that if you are an individual that you follow the instructions given from the form. If you do not have a website, you can use your personal social media account for the business website field. In addition, you can use your personal information for the home, and business address, and can add your name for the credit card statement, along with your phone number.