Hi! The Steem Basic Income is a good thing; you get guaranteed votes on most posts from the sbi accounts. The amount and frequency depend on the number of shares. You can influence this yourself by delegating SP to @steembasicincome. Other users can also give you shares, e.g. as a prize in a competition or similar.

Here is a good summary of the whole thing:

https://steemit.com/steembasicincome/@steembasicincome/how-do-i-join-steem-basic-income

Unfortunately, the service does not work via Beneficiaries.