It is a scam!!
I received the same message and contacted the support yesterday. You can check the repply I received from CGTrader support:
Hi there,
Thanks for reaching out.
Please ignore this message. This is a scam.
We have a help article to help determine if the contact person is from CGTrader or not. IF you receive anything in the future please first determine if message is from CGTrader or random user.
https://help.cgtrader.com/hc/en-us/articles/4413046247441-How-can-I-know-if-I-m-contacted-by-actual-CGTrader-employees