Now in the case you mentioned above. If you received the upvote from bot after 30 minutes of your post then 25% of the payout goes to curators. Suppose you got upvote after 30 minutes, lets do some maths. You get 0.32$ upvote, 25% of 0.32 is 0.08.
0.32 - 0.08 = 0.24 (total amount after curation)
0.24 ÷ 2 = 0.12(half of it is paid in sbd and half of it is paid in steem power). That's why divided by 2.
So you received 0.12sbd at payout of your post (if steem prices stay the same or it will change too).
This means if you received the upvote after 30 minutes of your post then you get a little profit in terms of steem power. And you received the same Sbd you invested.
RE: How NOT to use voting bots