No matter what the new payment is: I applied for the 17th of December payment with 50 posts and got nothing. Not even a reply. So it pretty much doesn't matter how moch one would 'eventually' get. I got nothing. I read some people received payments but somehow I doubt that the 'just apply and get paid' thing really works... sorry.
Yes, I see your point. If Stunna actually got your application and didn't pay you, it might be something wrong with your posts. I submitted 1212 posts (some 12 posts above the highest tier) and still got paid in full, which makes a much bigger sum than for 50 posts (so no sense for just withholding the bonus). So, if there is nothing wrong with you contacting Stunna, you should probably look through your posts for an answer...