It seems you've misunderstood about OP's question. He was asking how to earn free crypto, so it's mean he should be knew about crypto already (inc bounties). The reason because he wants to earn something really free from a site (like airdrops or faucet site which really pays us like freebitco.in)
Yes, you are right. But when I/others visit his post history then find a post. like this.
How do i join the bounty? Where can i find? What should I do while joining the bounties?
And we are talking about this topic in some previous replies. read the quoted lines and see his post histories, You can not find anything that the user does not know about how to join in bounties. And quoted line makes all suspicious what he posted recently actually.