In the example it shown how to query the latest checkpoint, get all the transaction and parse them one by one to get the balance changes of each address. There is an example on how a sponsored transaction can be created.
A sample GraphQL query but today this is only usable with: https://sui-mainnet.mystenlabs.com/graphql or https://sui-testnet.mystenlabs.com/graphql
In the near future this example will be made more comprehensive.