According to their official website: 🤔 !wine
Hive Stake Based Income (Hive SBI) is a social experiment to bring a voluntary crowdfunded basic income to as many Hivers as possible. Members join by sponsoring others into the program. Hive SBI is delivered through providing regular upvotes to member content.
Looks like you are one of the few Hive users who see that getting temporary HSBI units by delegating Hive Power (which wasn't part of the original plan for the SBI project) is better or more advantageous than the permanent lifetime units. 😅 !LUV