I follow the same rules, like upvoting between 15 and 30 min and choosing good posts. Many times a like a post with 10 upvotes on the beginning and 4 hours later he had 200 upvotes and 5k value but i dont win nothing, how to solve this? i have to invest on more steem?
Yeah, having more SP will directly influence your rewards for voting.
Do you know how much SP is good?
I'm not entirely sure, but a couple hundred will probably start showing some curation rewards.