Thanks for asking! Hive Stake Based Income (Hive SBI or HSBI) is an account-based curation model. Individuals sponsor others for regular upvotes, and receive their corresponding curation share as upvotes for themselves. Effectively, the subscription value is staked and dedicated to providing ongoing upvote support for both sponsor and sponsee. You can learn more about it at https://hivesbi.com, which includes links to our full documentation and discord.