2017 Tapvent Calendar: Day 1

What lies behind door one? Open the Tapvent Calendar for the chance to win.

The holidays are upon us, so for the next four days we will be spreading cheer by offering multiple chances to win a $50 Amazon gift card! To enter, simply click below to guess today’s Tapvent Calendar question. Each day, all correct responses will be entered into a random drawing. Winners will be notified on Dec 22nd. Keep your eyes peeled tomorrow for question #2!

Today’s Question:
According to Tapjoy’s latest Maximum Impact Report, on average, how much does a publisher’s average earnings per user increase during a currency sale?