HSBI do not appear as incoming transactions to your account. It's a 3rd-party acocunt-based curation initiative. Your HSBI units will appear on their webpage account lookup: https://www.hivesbi.com/userinfo/?user=sabiukpa

You can also see the sponsor history on the new dashboards, which show that all 3 of your units came from @freewritehouse : https://dashboard.hivesbi.com/dashboard/2-hive-sbi?hive_name=sabiukpa&tab=5-transactions&text=sabiukpa

You will accumulate pending upvote value based on how many you have and then receive periodic upvotes from their voter accounts.