I am not sure this is correct. looking at spreadsheet, we can see that users are getting 0.005 btc or similar payments.
Yes different users have different pay rate.
My assumption people who get 0.005 BTC are only for avatar campaign and the users only have to post at least one post in order to get paid.
However, 0.005 BTC is still the highest among other campaign, at that time 0.005 BTC was worth of $215.