Well the minimum bid is 0.1 SBD, the vote value of @siditech is currently 1.1SBD. When there's no other bids in the pot since the last vote and the bot is back on 100% votingpower you'll get the whole vote. Means you get 1.1 SBD vote for 0.1 SBD invest.
Like I said the bot is not being used much because it launched last week. And you can check on steemd how much bids are in the pot.