PayPal and credit card purchases now account for 90% of sales.
We can't quantify the actual revenue from bitcoin from the above figures in percentages. Users using bitcoin to pay for gift cards may not have fallen by that much. If Gyft's revenue rose 10x from 2013 to 2015, payment by bitcoin could have actually increased by 10% too:
|_Year_| | _Revenue_| | _CreditCard_| | _Bitcoin_| |
2013 | 100 | 10 | 90 |
2015 | 1000 | 900 | 100 |
These are not real figures. I am saying bitcoin usage may not have dropped, it could actually have risen, the massive drop in percentage came from explosion of Credit Card and PayPal payments.