Comment by kevinemoore

In general, a data publisher simply creates an S3 bucket in their account and sets the access control to allow public read. In the specific case of the AWS Registry of Open Data, data providers create a clean AWS account to hold the data (the account will have only S3 and won't run any compute services). Once the dataset is accepted into RODA, AWS will cover the costs (S3 storage and egress bandwidth) for the clean account.