Here is the link of the project. https://peakd.com/hive-189312/@steembasicincome/hive-sbi-value-balances-and-upvote-delivery
You need to subscribe the HSBI either by delegating or sending 1 Hive at least. But, if you want to send 1 Hive or more then use different account and in the memo mention the account you like to give subscription. All Detail is in the post.