Did you guys bother Reading the OP thread? The payment link clearly mentions 500 bits per thread while 5bits for each reply that thread gets. Also you get 10 bits for each reply you post. Visit the links OP has mentioned. All the details are mentioned. The payout is not bad in my opinion.
Remember 1 bit = 100 Satoshis.
I can't tell for btcevo, but i obviously missed that link.
Now i am reading it, i have to admit it's very interesting payment system where we can get money for our threads when someone post in them, but it will probably create bunch of spam threads.