Both of those shares earn you a vote on a post. SBI is a smaller vote but you can get one for each post. You can save up value and get a bigger vote. If value is low you get no votes till high enough. Incin boost is a bigger vote per share but limit of one vote each day and you have a 24 hr timer on the system. If you don’t post on day you lose that vote. So it is good for active posters while SBI is better for slower posters. Also @steembasicincome has other perks you can read about on their page.

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