For my example which happened 5 times for me and my friends about 10 times we were using the 90% more cost double rewards looking for unique bows. we both picked up 8x bow reward prophecies and for each one it was dropping only 2 for each prophecy we did. We joined COF for the prophecies and we are spending around 5-8k favor for each one. Please look into this because without a fix for this, i will not be playing until it is fixed.