There are several different account tiers with different pricing and features. The first tier, Creator, is free, and allows you to create collections and upload content. Though you can not sell content, you can still build a following and accept tips.
Next, there is seller. You receive all the functionality of creator, but now you can sell both courses and subscriptions. Through subscriptions, tips and courses, you can make passive income.
Finally, there is engager. In addition to having the functionality of both creator and seller, you can also host a variety of live events online. You also get a calendar to organize these for both you and your clients.