As you can see, I am a bear and the new costumed Gan Ju is soooooo fancy, I’d love to have his avatar. There are many avatar aficionados out there, and I am sure that many players will buy costumed avatars till they run out of stock 
Avatar shop is so oldschool, that they probably have to get rid of spider’s webs every day and the vendor knows some Latin.
This is one of the simplest ideas to increase gem expenditure and yet you (SGG) haven’t implemented it.
Give us avaaaataaaars!