Pieces designs usage statistics?

I would like to introduce a custom pieces set to the game, discussing it with the support now, but they don’t have access to the usage statistics  is this something you (devs) have?

Also would you be able to recommend exact file extension (png, svg) and if not vector - dimensions    

thank you!

-Geo

This club isn't a site development club. It's for community developers that want to use the Public API for their own projects.