I will say my piece, I have been selling on line for the past 16 years , only 2 1/2 years on Etsy.
2017 has so far been the best start to a year for sales in all the years that I have been selling and long may it continue.
I believe if you have the right products at the right price and you work on your shop like I do every day adding new items and changing things around it will and should pay benefits.
The secret of my current success is to source out unusual items which are in excellent condition and if possible as rare as possible.