Research:

Durov first mention of X GRUMPY - https://x.com/durov/status/611238648110010369?s=46

During these years, the cat was at the peak of its popularity.

The first classic sticker pack created in 2015 From the artist whom Pavel noted in X - https://t.me/addstickers/Animals

First classic pak to GRUMPY - https://t.me/addstickers/the_grumpy_cat

All the good things are the well-forgotten old ones 😎