Imagine that you have answered a question and you answer has been accepted by the person who asked this Question. Also, your Answer has 55 upvotes. Then, there are 3 more answers from other people, with 25, 5 and 1 upvotes.
MAX (Votes) = 55, so 40% of 55 = 22. Answer A with 25 upvotes also gets selected for referral fees b/c its 25 votes are greater than threshold (25 > 22). Answers B and C are not selected.
So we have 2 Selected Answers - Your Answer with 55 votes and Answer A with 25 votes. Your Answer would get 55 / (55 + 25) = 69% of $0.20, and Answer A would get remaining 31% of $0.20.
So Your Answer would get $0.14 and Answer A would get $0.06 in Bitcoins. Keep in mind that newly registered user would also get $1 after installing QRID app so maybe they would be kind to send you some more Bitcoins if they like your Answer!
Referral fees are paid instantly directly to your QRID wallet. You should receive a Push Notification about new transaction.
At this moment, we want to reward a very specific type of user behavior, i.e. posting UNIQUE QUALITY ANSWERS that also bring traffic from Google.