This is not an answer.I think ul has each month and other users that get 100% of the sales.I get every day 5-15 referrals and many of them buy premium.Month December sales are good.January much better traffic much better files bigger files(1080p) but only 3 sales.Hope February will be again with many sales and UL be more fair with the uploaders.
Me and three of my friends are doing monthly test purchases (over a year !). All purchases are counted. So work better. Or change content.