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Ok then if someone randomly find some important bugs/ amazing idea for an open source project. Then he
won't get rewarded from that bot, right?

Why not? I got a vote for some of bug hunting contribution but unfortunately I wasn't given a vote for every one of them. The bot can't vote for everybody. It selects the best posts and tries to vote for as much posts as it can.

Yeah that's what i meant. I was saying every approved post should get atleast small support from bot. For a contributor every single post is best post for him.