Re: A few questions about payments to bounty hunters
You will not get a lot for participating in twitter and facebook campaigns. It is normal, that for tw/fb campaign you will get about 40-50 USD. The content campaigns are great and I think for a blog post the hunters should get a least 100 USD. I saw a bounty campaign, where translators got 32 Ethereum each 
Translations received a lot of rewards, I've seen many translators receive $ 10,000 for their translations. When I joined the signature campaign, I could only earn 1500$ per campaign, but the translation received 5-10 times more reward