I mean have you seen the correlation between the internet and cats? Its almost pure symbiosis lol
Cryptokitties runs off the etheruem bloclchain. Etheruem features smart contracting which is why it stands out that you can make a GAME for this currency as a fun way to get people interested in it.

Also you have a link to source the 40 billion dollar congestion? I saw where the blockchain was congested from all the new users trading so much in such a short time, but no word on the amount that high.
-//isaac✌